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How to Store Breast Milk: The Complete Guide

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Shop Milk Storage

How long does breast milk last?

How to thaw & warm safely

How to store breast milk on-the-go

Ready to pump?

Answer a few quick questions & we'll help you find your perfect match.

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Meet the Breast Milk Cooler

Featuring two ways to cool - ice cubes or an in-bottle ice core that lends itself to sanitary milk transfers - this unique design cools breast milk faster and keeps it cooler longer vs. leading milk coolers.*

Shop Milk Cooler

*Compared to leading milk coolers in Eurofins 2026 controlled, third-party testing

The future of breast milk storage is here

Durable, leakproof, self-standing milk storage bags, now with scannable SmartStashโ„ข technology.

Shop SmartStashโ„ข Milk Bags

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Breast Milk Cooler
New
HSA/FSA
25% OFF

Breast Milk Cooler

Meet the Breast Milk Cooler that cools faster and stays colder for up to 24 hours vs. leading milk coolers.* Plus, with new sizes, colors, and two ways to cool, this patent-pending Cooler safely and stylishly lets moms store milk wherever the day takes them.
*Compared to leading milk coolers in Eurofins 2026 controlled, third-party testing
from $39.99
Smart Storage Bundle
20% off
HSA/FSA

Smart Storage Bundle

Put your breast milk organization on autopilot. Featuring our premium Breast Milk Storage bags with SmartStash capabilityโ€“a unique scannable code that lets you auto-input and track bags in your digital stashโ€“and Flatteners to evenly organize and freeze your physical stash, this combo does the mental math for pumping moms.
$35.98 $28.78 20% off
Breast Milk Bag Flatteners
New
HSA/FSA
25% OFF

Breast Milk Bag Flatteners

Optimize breast milk storage with our new Breast Milk Bag Flatteners, designed to help you neatly and efficiently organize every last drop.
$24.99
Breast Milk Storage Bags with SmartStashโ„ข Tracking
New
HSA/FSA
25% OFF

Breast Milk Storage Bags with SmartStashโ„ข Tracking

Same high-quality bag, new top-quality tech. Our durable, leak-proof bags are now designed with a scannable, AI-enabled code to auto-input your milk bag information into your digital stash in the Willow app. However you choose to pour and store, youโ€™ll finally have the control and peace of mind you crave.
from $10.99
Glass Breast Milk Pitcher (32 oz)

Glass Breast Milk Pitcher (32 oz)

Designed to simplify fridge storage, make milk transfer mess-free, and help you combine your pumped milk throughout the day.

$19.99
Breast Milk Cooler Ice Pack
New
HSA/FSA

Breast Milk Cooler Ice Pack

Designed to fit inside both 16 oz. and 25 oz. Coolers, the Breast Milk Cooler Ice Pack fits inside the Cooling Cup to keep breast milk safely chilled for up to 24 hours. Use as a back-up so youโ€™ve always got a frozen pack on deck, or as a replacement.
$14.99
Glass Breast Milk Pitcher Duo
20% off

Glass Breast Milk Pitcher Duo

Bundle up with two of our glass milk pitchers, to help you combine your pumped milk throughout the day.

$39.98 $31.98 20% off

We believe moms deserve better.

Since creating the first fully wearable pump, weโ€™ve continued to innovate in ways that always put moms first, helping extend the breastfeeding journey with more freedom & less compromise.

Start Your Journey

Read more expert tips & advice

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