Training Example: Willow Pump – Review the Data, Give Your Score & Compare to the Real AI Evaluation

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Summer calls for our biggest sale of the year
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Summer calls for our biggest sale of the year
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Up to 44% off starts now
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Up to 44% off starts now

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WILLOW WAVE
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A manual pump for today's mom.

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WILLOW GO
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#1 in comfort.For mom's first priority.

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NEW & NOTEWORTHY
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Pump, feed, pour, and store with confidence.

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Pumping, revolutionized
Innovating for moms' freedom & mobility with pumps designed for comfort & milk output.

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Willow Go
Our best-selling pump with the most comfortable fit for more milk output.
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Willow 360
Pump in any position with 360, the only 100% leak-proof wearable.
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WILLOW IS THE ONLY LEADING PUMP BRAND FOUNDED AND BASED IN THE U.S. THAT’S A TEAM BUILT OF WOMEN INNOVATING FOR WOMEN.
[H2]
WILLOW IS THE ONLY LEADING PUMP BRAND FOUNDED AND BASED IN THE 
U.S. THAT’S A TEAM BUILT OF WOMEN INNOVATING FOR WOMEN.

Inventor of the first wearable breast pump in 2017

US-based, clinically tested, and FDA approved.

120+ patents and 5 trademarks

World-class smart technology

OUR MISSION
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We believe moms deserve better

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MOM RESOURCES & SUPPORT
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Expert guidance, when you need it

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Have pump, will travel
Get everything you need to breastfeed while on-the-go.

[IMG: Willow Wave Manual Breast Pump]

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[H3] Willow Wave Manual Breast Pump

A must-have for every nursing mom: The only wearable in-bra manual pump with an ergonomic handle and hospital-strength, two-phase suction - no charging required. Includes 24 mm flange made of soft silicone for a smooth fit and optimal milk flow.

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$34.99
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[IMG: Travel Cleaning Pack]

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[H3] Travel Cleaning Pack

The all-in-one cleaning kit for pump parts, bottles, and more. Just add your favorite soap!

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$29.99
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[IMG: Pump Anywhere Case]

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[H3] Pump Anywhere Case

Protect your pump on-the-go with our sleek, sturdy, and easy-to-clean carrying case.

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[IMG: Pump Anywhere Bag]

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[H3] Pump Anywhere Bag

Designed to be worn three ways (backpack, crossbody, or shoulder bag) with a removable cooler.

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Why buy direct from Willow?

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Free Shipping
Free shipping on all pump orders - delivering pumping freedom to your front door!

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Exclusive Savings
Save on pumps with insurance, HSA/FSA or installments starting at just $29.*

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Superior Care
Willow ranks #1 in customer satisfaction, the highest rating for any breast pump brand.*

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2-Year Warranty
Get peace of mind with an extended protection plan on your pump, only available for purchase here.

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Commonly Asked Questions
What are the best wearable breast pumps for going back to work?

The Willow Go® Wearable Breast Pump is the top choice for working moms — it sits entirely inside the bra, delivers hospital-grade suction, and is ranked #1 for comfort and milk output. For moms who need 100% leak-proof confidence in any position, the Willow 360™ is the only pump on the market that guarantees no spills, even when bending or moving between meetings.

Can I pump hands-free while in meetings or at my desk?

Yes. Willow Go® and Willow 360™ are fully in-bra wearable pumps — no tubes, no cords, and no need to stop what you're doing. Both connect to the Willow app so you can track sessions and milk output right from your phone, making it easy to pump discreetly during calls, at your desk, or between appointments.

Which breast pumps fit discreetly under clothes without leaking?

Willow Go® is designed to sit low and flat against the chest, with a flange tunnel that distributes weight evenly so the pump stays secure and discreet under any top. The Willow 360™ takes it further — it's the only wearable breast pump that is 100% leak-proof in any position, so there's no worry about spills on work clothes.

What breast pump is most comfortable for 8+ hours of daily wear?

Willow Go® was built for all-day wear. Its flange features a longer tunnel depth, lower tunnel placement, and a smooth uninterrupted inner surface — all designed to reduce friction and accommodate different nipple anatomy. Better fit means less discomfort, and less discomfort supports stronger milk output throughout the day.

Which breast pumps are the quietest for use in a shared office?

Both Willow Go® and Willow 360™ operate quietly enough for shared office environments and video calls. If ultra-quiet discretion is the top priority, the Elvie Pump is also an option — it's known for its slim, near-silent design.

Can a breast pump help increase or maintain my milk supply?

Consistent, frequent pumping is one of the most effective ways to maintain or build supply — especially after returning to work. Willow Go® delivers hospital-grade suction in a wearable form, making it easier to pump on schedule throughout the day without disrupting your routine. Comfort also plays a direct role: discomfort during pumping can inhibit the let-down reflex and reduce output, which is why fit and flange sizing matter as much as suction strength.

Which breast pumps have app tracking for monitoring milk output?

Willow Go® and Willow 360™ both connect to the Willow app, which tracks session duration, milk volume, and pumping history over time. This makes it easy to spot trends in your supply, share data with a lactation consultant, or simply stay on top of daily output goals while managing a full work schedule.

How do I choose the right flange size for my breast pump?

Flange fit is one of the most important factors for both comfort and milk output. A flange that's too small can cause pain and restrict milk flow; one that's too large reduces suction efficiency. Willow offers a Breast Pump Sizing Kit ($24.99) to help find the right fit, plus universal Sizing Inserts for fine-tuning. The Willow Sizing Hub also walks through the full measurement process step by step.

What's the best breast pump for elastic or sensitive nipples?

Nipple anatomy matters more than most people realize when choosing a pump — and for moms with elastic nipples, flange tunnel depth is the most important fit factor. The Willow Go® is specifically designed with a significantly longer flange tunnel than other wearable pumps, which gives elastic nipples more room before the tunnel opening and helps prevent painful contact with the end of the tunnel during suction. Its smooth, uninterrupted inner flange surface also reduces friction and abrasion during long sessions. Because discomfort during pumping can inhibit the let-down reflex and reduce milk output, getting the right fit isn't just a comfort issue — it directly affects how much milk you express. Use the Willow Sizing Hub or the Breast Pump Sizing Kit ($24.99) to find your correct fit before your first session.

How easy is it to clean a wearable breast pump?

Ease of cleaning is one of the most underrated factors when choosing a pump — especially for moms pumping 4–8 times a day at work. Willow Go® and Willow 360™ are designed with minimal parts, making them faster to rinse and reassemble between sessions. Willow's SmartStash milk storage bags are self-sealing and disposable, which eliminates the need to transfer and clean bottles after every session. Replacement parts — including valves, flanges, and bags — are available directly on the Willow site so you're never scrambling to find compatible accessories.

Does insurance cover a breast pump?

In most cases, yes. Under the Affordable Care Act, health insurance plans are required to cover breast pump equipment as a preventive benefit — though coverage details vary by plan, including whether you receive a rental or purchase, and which brands qualify. Many plans cover the Willow Go® or Willow 360™ in full or with minimal out-of-pocket cost. See the full guide to getting a breast pump through insurance for step-by-step instructions on checking your benefits and submitting a claim.

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*Promotional price valid for up to 30% off the purchase of Willow pumps and up to 25% off the purchase of Willow accessories. Code VIP40 will apply an additional 10% off Willow Go pump only. Offer ends on 6/27/2026 at 11:59 pm PT. Cannot be used on Kindred Bravely items, Silver Nursing Cups, Cooling Gel Nipple Pads, Reusable Breast Pads, sale items, subscribe and save items, or combined with any other offers or applied to previously placed orders. Cannot be applied to orders made through the Willow Insurance Coverage Program. We reserve the right to change these terms and conditions at any time

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Willow Go® Wearable Breast Pump
Regular price
$349.99
$244.99
Unit price
/per

HSA/FSA
40% OFF
[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

HSA/FSA
40% OFF
[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

[IMG: Willow Go® Wearable Breast Pump]

Bonus! Extra $34 Off Go with code VIP40

Pump:
Double
Double
Single

Quantity selected exceeds current stock

Just $29/mo with
Buy now, pay later with installments at checkout

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Key Features

COMFORT = OUTPUT: 105° flange angle; longer, smoother flange tunnel, curved edges, and more prevents nipple crashing, pinching and discomfortPOWERFUL: 15 levels of customizable, hospital-strength, tug-and-release suction (up to 295 mmHG per side)CONVENIENT: App-controlled with ability to input milk volumeDISCREET: Fully in-bra with a discreet low profile and shape that mimics the breast — no cords, tubes, or external motorsPEACE OF MIND: Clinically tested, FDA cleared, and made without BPA for a safer pumping experienceHOLISTIC SUPPORT: In-app partnerships with lactation consultants and other postpartum experts + our medically validated AI tool, EmaFLEXIBILITY: Compatible with 5 oz or 7 oz breast milk storage containers

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What to know

App-controlled with ability to input milk volume In-app partnerships with lactation consultants and other postpartum expertsCompatible with 5 oz or 7 oz breast milk storage containers for ultimate flexibilityRechargeable battery that lasts up to 8 pumping sessionsDishwasher-safe parts for easy cleaningClinically tested, FDA cleared, and made without BPA for a safer pumping experienceIncludes 21mm and 24mm flangesIncludes sizing inserts so you’ve always got access to your perfect pump fitAward-winning customer careCreated for women by women

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What Makes Willow Go Better

92% of moms recommend Willow Go85% of moms say Willow Go is easier to use than their other wearable pumps83% of moms say that Willow Go made their postpartum life easier82% of moms say Willow Go is more comfortable than their other wearable pumps77% of moms say Willow Go is more discreet than other wearable pumps71% of moms say Willow Go gives better milk output than their other wearable pumps

[H3]
What’s Included

2 Willow Go pumps2 Flanges (24mm)2 Sizing Inserts (21mm, included with Double pump only)2 Breast milk containers (5 oz.)2 Container backs2 Splashguards2 Pump diaphragms2 Duckbill valves2 USB charging cables**USB power adapter not included. Willow Go is compatible with any 5 Volt, 1-2 AMP USB charging source or shop ours here.Please note the Willow Go Single Pump includes only 1 each of the above. 21mm flanges are not included with the Single Pump.

[IMG: Willow Go® Wearable Breast Pump]

Willow Go® Wearable Breast Pump
$349.99$244.99

Quantity selected exceeds current stock
Adding product to your cart

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Customer reviews

designed with mom in mind
[H2]
More comfort. More milk.
We designed Willow Go for mom's anatomy, giving you the most comfortable fit for more milk output.

[H3]
Longer Flange Tunnel
Accommodates more nipples (even elastic!) to avoid abrasion.

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Interior Circular Motor
Ensures even weight distribution for better nipple alignment.

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Curved Flange Edge
A curved flange edge prevents pinching or pulling of breast tissue.

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Wide Flange Cone
Clinically proven to express a higher volume of milk in less time.

Hospital-grade suction

Fully in-bra, no cords or external motors

App-connected & controlled

Dishwasher safe with few parts to clean

1:1 support from a Willow pump expert

FDA cleared & clicnically tested

Best baby gear of 2026
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"A pretty perfect pump"
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Willow Go chosen as best wearable pump by WIRED parent reviewers

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Why moms love Willow Go

*Compared to other wearable pumps. Brandtracker independent survey by Rabin Roberts Research of 500 pumping moms, November 2024

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Real Willow Go Moms. Real Results.

"Not only does the pump and app work great, but I’m getting a better output than I was with my plug-in pump. I’m so thrilled with my Willow Go"

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Pump more freely with the Willow app
Meet your ultimate pumping companion. Control your pumps, track your session, and connect with experts with a tap with the Willow app.

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The 90-Day Rule
Remember to swap out pump parts every 90 days to ensure maximum pump efficiency, or get a backup set of parts now for less cleaning after each session.
Shop Go Parts

[IMG: Willow Go® Backup Parts Set]

HSA/FSA
20% OFF

[H3] Willow Go® Backup Parts Set

Swap out your Willow Go pump parts every 90 days to ensure maximum efficency or get a backup set for less cleaning with this bundle!

Regular price
$78.97
$59.22

25% off

Unit price
/per

Quantity selected exceeds current stock

[IMG: Willow Go® Splashguard Container Set (2-pack)]

New
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[H3] Willow Go® Splashguard Container Set (2-pack)

Our reusable containers (available in 5 oz and 7 oz) now feature a silicone Splashguard to give you more peace of mind (and less mess) when pumping.

Regular price
$34.99
$26.24

25% off

Unit price
/per

Quantity selected exceeds current stock

[IMG: Willow Go® Flange Set (2-pack)]

HSA/FSA
25% OFF

[H3] Willow Go® Flange Set (2-pack)

Available in three sizes (27 mm, 24 mm, and 21 mm) and compatible with sizing inserts, so you can find what works for you no matter what.

Regular price
$39.99
$29.99

25% off

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/per

Quantity selected exceeds current stock

[IMG: Willow Go® Pump Diaphragm Set (2-pack)]

HSA/FSA
25% OFF

[H3] Willow Go® Pump Diaphragm Set (2-pack)

Made of food-grade silicone, our diaphragm creates suction and prevents milk backflow into the pump.

Regular price
$21.99
$16.49

25% off

Unit price
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Quantity selected exceeds current stock

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How should my breast pump fit?

[H2]
How to measure nipple size

[H2]
What size inserts do I need?

[H2]
Ready to find your fit?
We're here for you. Get all the sizing info you need, all in one place.

Sizing Guide

[H2]
Frequently Asked Questions

What makes Willow Go™ different from traditional breast pumps?

Willow Go offers the best of both worlds — built with hospital-grade suction and a comfortable tug-and-release latch (the same you’re used to if you’ve used other wearables or a traditional pump) while fitting fully in-bra. It’s proof that you don’t need to sacrifice comfort and convenience for output.
Learn more about why Willow is different from other pumps, or check out our blog post for more information on how Willow pumps differ from manual and electric breast pumps.

What are the differences between Willow 360 and Willow Go?

Both pumps are fully in-bra with no bulky motors or cords, making it possible to pump on the go, and controllable via the Willow app. However, Willow Go cannot be controlled via Apple Watch, while Willow 360 can.
Willow Go is the perfect pump for every day with a 100% comfort rating and a tug-and-release latch designed for optimal output. Moms who use Willow Go say that they get as much, if not more milk when compared to other traditional or wearable pumps.
Unlike Willow 360, which offers moms 100% leak-proof mobility, Willow Go is leak-proof up to 45° — meaning you can still move around, but cannot use it while laying down or bending all the way over.
Willow 360 offers the option to pump into 4 oz milk bags or reusable containers, while Willow Go is only compatible with reusable containers. However, Willow Go offers a higher capacity option than Willow 360 — up to 7 oz per side.
Check out our comparison page for more, or take our pump quiz to decide which pump is right for you.

Can I use my HSA/FSA?

Yes, you can. Simply pay for your breast pump and accessories using your FSA/HSA debit card at checkout, or pay with another credit card and submit your receipt to your plan administrator for reimbursement.

Do you offer financing?

Yes! We partner with Affirm to offer split pay and installment payment plans for Willow pumps. Learn more about our financing options.

How many ounces does Willow Go hold?

Willow Go holds up to 5 oz of milk (10 oz total). If you pump more than 5 oz per side, purchase our 7 oz containers to pump up to 14 oz per session (sold separately).

What do you mean by hospital grade suction strength?

We know every ounce matters when it comes to pumping and breastfeeding, so we engineer our pumps to optimize milk expression.
Willow Go offers maximum suction of up to 295 mmHG per side. It’s also a closed-system pump, just like hospital-grade pumps, to keep your breast milk separate from the pump mechanisms for cleanliness and hygiene.

Do I need a special bra for Willow Go?

No. But Willow Go works best with a pumping or nursing bra that’s snug and stretchy (no underwire!) with full coverage so just the top of the pumps peek out. Avoid bras with underwire or padding. The Daily Pumping Bra is designed specifically for Willow pumps, making it a great choice for optimal comfort and output.

Does Willow Go have a warranty?

Yes! Willow Go is covered under a 12 month warranty from the purchase date. Accessories - all replaceable pump parts including but not limited to flanges, containers, diaphragms, duckbills, chargers and sizing inserts- are covered under a 90 day warranty. Please review our warranty policy.
Since breast pumps are single-user devices, use by more than one person, including purchasing second hand, will invalidate the warranty. Please keep your original proof of purchase from onewillow.com or an authorized retailer as it is required to exercise your warranty.

Is Willow Go good for elastic nipples

Yes — Willow Go was specifically engineered for moms with elastic nipples. Its flange tunnel is significantly longer than other wearable pumps, giving elastic nipples more room before the tunnel opening and preventing painful contact with the end of the tunnel during suction. The smooth, uninterrupted inner flange surface also reduces friction and abrasion. Because nipple discomfort can inhibit the let-down reflex and reduce milk output, this design difference directly affects how much milk you express. Use the Breast Pump Sizing Kit to confirm your fit before your first session.

Can I pump while working — during meetings, at my desk, or on calls?

Yes. Willow Go sits fully inside your bra with no cords, tubes, or external motors, so there's nothing visible and nothing to hold. The Willow app lets you start, stop, and adjust suction from your phone without touching the pump. Moms report pumping on video calls, during commutes, and between meetings without anyone knowing.

How does Willow Go help with milk output?

Willow Go's ComfortFlow™ technology is built around the principle that comfort and output are directly connected. Its 105° flange angle, longer tunnel, curved edges, and wide flange cone are clinically designed to reduce nipple pain and improve milk expression. In an independent survey of 500 pumping moms, 71% said Willow Go gives better milk output than their other wearable pumps.

How long does the battery last and can I use it without being near an outlet?

Willow Go's rechargeable battery lasts up to 8 pumping sessions on a single charge, making it fully portable for a full workday — no outlet required. It charges via USB, so it's compatible with any standard USB power source, laptop, or portable battery pack.

How easy is Willow Go to clean?

Willow Go has fewer parts than most pumps and all parts are dishwasher-safe, making cleanup fast between sessions. For on-the-go cleaning, the Travel Cleaning Pack has everything you need. Replace pump parts every 90 days to maintain maximum suction and efficiency — the Willow Go Backup Parts Set makes it easy to keep a spare set ready.

Does insurance cover the Willow Go?

Many insurance plans cover the Willow Go in full or at reduced cost under the ACA's preventive care benefit for breast pumps. You can also purchase using HSA/FSA funds at checkout. See the full insurance coverage guide for step-by-step instructions on checking your benefits.

View Our Help Center

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Your pumping questions, answered
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Your pumping questions, answered
Guides, tools, and coaches to support every stage of your pumping journey.

Get Started

HOW TO CHOOSE A BREAST PUMP
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What to actually look for in a wearable pump

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PUMPING 101
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Everything new moms need to know about pumping

Learn More

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Not sure where to start?
Answer a few quick questions & we'll help you find your perfect match.

Find My Pump

[H2]
How should my breast pump fit?

[H2]
How to measure nipple size

[H2]
What size inserts do I need?

[H2]
Flange Sizing: What Most Pumps Get Wrong
One of the most important measurements that determines whether you pump comfortably is the flange tunnel length. If it's too short, your nipple is likely to crash into the back of the pump and cause pain while pumping, which can lead to many issues including lessened milk output.

Read the Full Article

[H2]
Meet Willow Go
[H2]
Designed for more comfort & milk output
It's our best seller for a reason. Powered by innovative ComfortFlow™ technology, Willow Go is designed to fit your anatomy, giving you more comfort, convenience, and milk output.

Discover Willow Go

[H3]
Long Flange Tunnel
Accommodates more nipples (even elastic!) to avoid abrasion.

[H3]
Curved Flange Edge
A curved flange edge prevents pinching or pulling of breast tissue.

[H3]
Wide Flange Cone
Clinically proven to express a higher volume of milk in less time.

[H3]
Interior Circular Motor
Ensures even weight distribution for better nipple alignment.

MILK STORAGE & THAWING GUIDELINES
[H2]
How to Store Breast Milk: The Complete Guide

View Guide

MOM COACHES
[H2]
Real-life support for real-life feeding

Learn More

[H2]
Expert Tips & Advice

View All

[IMG: How Long Should I Pump for Maximum Output?]

[H3]
How Long Should I Pump for Maximum Output?

Read More

Breastfeeding & pumping

[IMG: Best Pump Settings for Letdown and Milk Flow]

[H3]
Best Pump Settings for Letdown and Milk Flow

Read More

Breastfeeding & pumping

[IMG: Ask an LC: Managing Pain & Discomfort in the Early Days of Breastfeeding]

[H3]
Ask an LC: Managing Pain & Discomfort in the Early Days of Breastfeeding

Read More

Breastfeeding & pumping

Expert guidance

[IMG: Want Comfort & Output? What To Look For In a Wearable Pump]

[H3]
Want Comfort & Output? What To Look For In a Wearable Pump

Read More

Breastfeeding & pumping

Expert guidance

[IMG: Myth Busting: Debunking Common Breast Wearable Pump Misconceptions]

[H3]
Myth Busting: Debunking Common Breast Wearable Pump Misconceptions

Read More

Breastfeeding & pumping

Expert guidance

Join more than 5,000 moms in the Willow Community to find answers to common breastfeeding questions, learn from Willow experts, and connect on all things postpartum.

Join Our Community

[H2]
WILLOW IS THE ONLY LEADING PUMP BRAND FOUNDED AND BASED IN THE U.S. THAT’S A TEAM BUILT OF WOMEN INNOVATING FOR WOMEN.
[H2]
WILLOW IS THE ONLY LEADING PUMP BRAND FOUNDED AND BASED IN THE 
U.S. THAT’S A TEAM BUILT OF WOMEN INNOVATING FOR WOMEN.

Inventor of the first wearable breast pump in 2017

US-based, clinically tested, and FDA approved.

120+ patents and 5 trademarks

World-class smart technology

[H2]
We believe moms deserve better
Since creating the first fully wearable pump, we've continued to innovate in ways that always put moms first - helping them extend their breastfeeding journey with more freedom and less compromise.

About Us

Discover Willow

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[H2]
Breast Milk Cooler
Regular price
$39.99
$29.99
Unit price
/per

New
HSA/FSA
25% OFF
[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

New
HSA/FSA
25% OFF
[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

[IMG: Breast Milk Cooler]

FREE limited edition stickers with every Milk Cooler purchase

Color:
Seaglass - 16oz

Quantity selected exceeds current stock

[IMG: Pay using HSA/FSA with flex]

[IMG: Select Flex at checkout to pay for your HSA/FSA eligible items]

[H3]
Key features

16 oz size holds up to 3–4 pumping sessions on average25 oz holds up to 5–6 pumping sessions on averageCools breast milk faster and safely keeps it colder for up to 24 hours vs. leading milk coolers*Two ways to cool: Ice cubes or ice packCooling cup stays in cooler for more sanitary milk transfersMade of durable, double-walled stainless steel

[H3]
What to know

Made without BPA, BPS, and PFASFood-grade 304 stainless steelDesigned and tested to meet breast milk storage guidelines and protocols set by the Centers for Disease Control and Prevention (CDC) and American Breastfeeding Medicine (ABM)Made with food-contact materials compliant with FDA 21 CFR and tested to meet U.S. safety standards for CPSIA and related CPSC regulations.TSA compliantSleek design fits in most cupholdersThis patent-pending Milk Cooler is designed for upright use only. Do not lay the unit on its side or store it horizontally for extended periods of time. This can compromise the integrity of the seals, resulting in liquid leakage

[H3]
What's included

1x Lid
1x Cooling Cup Spout
1x Ice Pack
1x Cooling Cup
1x Cooler Bottle

Free shipping on orders $50+

Top-ranked 24/7 customer care

[IMG: Breast Milk Cooler]

Breast Milk Cooler
$39.99$29.99

Quantity selected exceeds current stock
Adding product to your cart

[H3]
Customer reviews

[H2]
The cool kind of convenience.
[H2]
The cool kind of convenience.
Travel stress-free knowing our Breast Milk Cooler keeps milk chilled at a safe temperature for up to 24 hours.
Travel stress-free knowing our Breast Milk Cooler keeps milk chilled at a safe temperature for up to 24 hours.

Learn More

Keeps milk at a safe temperature for up to 24 hours

2 sizes hold up to 
16 oz. or 25 oz. milk

Two ways to cool

Ice core stays in bottle for sanitary milk transfer

Fits in most cupholders

TSA compliant & travel friendly

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Cools faster. Stays colder.*
Now with two ways to cool, this newly redesigned, on-the-go essential makes travel a cinch.*Compared to leading milk coolers in Eurofins 2026 controlled, third-party testing

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Two ways to cool. 
Endless peace of mind.
No fridge? No problem. Our new Breast Milk Cooler makes it easy to chill milk on the go with ice cubes or an ice pack.

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How long does breast milk last?

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How to thaw & warm safely

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How to store breast milk on-the-go

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Learn from our experts

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Expert-Backed Guidelines for Safe Breast Milk Storage

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Expert guidance

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Frequently Asked Questions

How many ounces of breast milk does the Breast Milk Cooler hold?

16 oz: The Willow Breast Milk Cooler holds up to 16 ounces of breastmilk with the ice pack & 27 ounces without. (That's 3-4 pumping sessions' worth of milk on average.)25 oz: The Willow Breast Milk Cooler holds up to 25 ounces of breastmilk with cooling & 37 ounces without cooling. (That's 5–6 pumping sessions' worth of milk on average.)

Are the Cooler parts dishwasher safe?

You can put the stainless steel Cooler Bottle, Lid, Cooling Cup, and Cooling Cup Spout into the dishwasher. We recommend hand-washing the Ice Pack.

How long should I keep the Ice Pack in the freezer prior to putting it in the Cooler?

For optimal results, put the Ice Pack in the freezer for at least 8 hours, and ideally up to 12 hours.

How long can I keep my breast milk in the Cooler?

According to the CDC and ABM guidelines, breast milk can stay in a cooler with ice packs below 59°F for up to 24 hours and remain at a safe temperature.

What are the dimensions of the Cooler?

The 16 oz. Cooler is 9.75’’ tall and 3.75’’ wide at the widest point. It fits in most standard cup holders.
The 25 oz. Cooler is 10.5’’ tall and 3.75’’ wide at the widest point. It fits in most standard cup holders.

Is the Cooler compliant with TSA travel requirements?

Yes! TSA regulations state that any medical necessary gel ice packs are exempt from liquid travel restrictions in any state (eg. melted, slushy), and with or without the presence of breast milk.

Can the Cooler be used for formula storage on the go?

Our Breast Milk Cooler was designed and tested specifically for breast milk storage. For more information on storing formula, refer to the Centers for Disease Control (CDC) guidelines for safe milk storage.

Can I pool milk from multiple sessions in the Cooler?

Yes, the formula is designed to store milk from multiple pumping sessions. Only combine milk pumped over the same 24 hour period.

If I store the Cooler in the refrigerator, can I keep milk in it for longer than 24 hours?

Milk should only remain in the Cooler for 24 hours before being transferred into a breast milk storage bag and kept in the refrigerator (for up to 4 days) or freezer (for up to 6 months).The Cooler should only be stored in the refrigerator with the frozen ice pack in place.

Can I use milk bags inside the Cooler for storage on the go?

Yes, this is a great option if you are concerned with mixing freshly pumped & already cooled milk.

When I use ice, I notice that most of the ice melts. Should I be concerned about my milk?

Rest assured, we have tested our cooler with ice cubes (even adding multiple batches of warm milk!). When you add fresh breast milk, the ice will begin to melt as it cools down your milk. Once your milk is cooled, the vacuum insulated bottle will do its job! If you’re still concerned, you can always check the temperature of your milk and add more ice to the cooling cup.

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