Two new ways to cool, same powerful chill
You asked, we answered: Our new breast milk cooler combines everything you love about the first one, but this time, it cools faster and stays colder for up to 24 hours vs. leading milk coolers.* Plus, it has two innovative ways to cool and a design that’s even more sanitary for milk transfers. In true Willow fashion, we’re always innovating for moms, and we knew we could do better. So whether you’re traveling or just pumping on the go, here’s a new-and-improved way to easily store breast milk at a safe temperature for up to 24 hours. Peace of mind, unlocked.
What's new?
It’s not just the curvy new design in fun colors that got upgraded. This cooler features a design that accommodates both ice cubes or an included ice pack, giving you more flexibility on the go. It also includes a Cooling Cup Spout, which means you can pour breast milk directly into and out of the cooler without removing the ice pack. What you can expect is the same easy-to-grab handle, fits-almost-anywhere silhouette, and of course, the ability to keep breast milk below 59°F for 24 hours.
Features & Benefits
- 16 oz. size holds up to 27 oz. without cooling cup
- 25 oz. holds up to 37 oz. without cooling cup
- Cools breast milk faster and safely keeps it colder for up to 24 hours vs. leading milk coolers*
- Designed 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 without BPA, BPS, and PFAS
- Dual-cooling options: Ice cubes or ice core that stays in bottle for sanitary milk transfers
- Made of durable, double-walled stainless steel
- TSA compliant
- Sleek design fits in most cupholde
How to use: Ice pack or ice cubes
- Place the ice pack or the ice cubes into the cooling cup. Twist the cooling cup spout on tight. Assemble into the cooler and start your day.
- Pump as you regularly would. When you’re ready to transfer your milk, remove the lid and place it on a flat, clean surface. Leaving the cooling cup inside the cooler, pour milk directly over the cooling cup into the cooler.
- When you’re done transferring your milk, place the lid back onto the cooler to cool your milk to a safe storage temperature.
- This 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.
How we know it’s safe: our testing
We worked with a third party independent testing lab to spearhead our safety testing. That means our portable milk cooler was designed and tested to meet Centers for Disease Control and Prevention (CDC) Breast Milk Storage Guidelines and American Breastfeeding Medicine Protocol. So, what did we set out to test? We wanted to answer two questions: If our coolers would bring your body temperature breast milk down to a temperature that is safe for storage, and how long would it keep it at that temperature? The Discovery: Our Portable Breast Milk Cooler will keep your breast milk at a temperature below 15C / 59F for up to 24 hours.
The big chill
Our mission is to make life easier for breastfeeding moms, and this cooler cracks the code on chilled milk. You can learn more about safe milk storage in our Expert-Backed Guidelines for Safe Breast Milk Storage and if you’re interested in learning more about pooling your milk, don’t miss The Benefits of Breast Milk Pooling & Expert Tips from a Pediatrician and Lactation Consultant
*Compared to leading milk coolers in Eurofins 2026 controlled, third-party testing
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