Willow: Wearable Breast Pump – Willow Pump

Breast Milk Cooler

Breast Milk Cooler - Main image
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$20 $49.99 In stock

Category: Milk Storage

Meet the Breast Milk Cooler that cools faster and stays colder for up to 24 hours vs. leading milk coolers.* 

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.

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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

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

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.

How long does breast milk last?

How to thaw & warm safely

How to store breast milk on-the-go

Before you pay

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When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Evelyn D. ★★★★★

I was skeptical about the 24-hour cold claim, but after a full day of travel, the milk was still icy and safe. The faster cooling really does make a difference when you're rushing between flights.

Emma ★★★★★

My pump parts fit easily inside with the milk bags, and the cooler held everything at fridge temp through a whole day of errands—that 24-hour cold claim actually checks out. Ice packs are still icy this morning, which I was not expecting.

Jason ★★★★★

Cold milk for an entire 24-hour stretch is a game-changer for overnight hospital stays, and the carrying strap makes it feel less like medical gear. I’ve crammed it into a crowded diaper bag and it still kept everything icy through an 8-hour workday. It’s honestly the only cooler I trust with pumped

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