Elvie Willow Portable Breast Milk Cooler (16oz, 473ml)

Meet the Breast Milk Cooler, which keeps milk cool for up to 24 hours. Plus, with two ways to cool, this patent-pending Cooler safely and stylishly lets mums store milk wherever the day takes them.

Available in the colour Seaglass - 473ml/16oz.

In partnership with Willow. Elvie and Willow are pioneers of female-first technology. United in our commitment to provide women with a higher level of care.

Key Features

• 473ml / 16oz size holds up to 3–4 pumping sessions on average
• Safely keeps milk cool for up to 24 hours
• Two ways to cool: ice cubes or ice pack
• Cooling cup stays in cooler for more sanitary milk transfers
• Made of durable, double-walled stainless steel
• Sleek design fits in most cupholders

What's In The Box

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

In Partnership: Elvie x Willow

In 2026, Elvie and Willow became sister brands, bringing mums and women the products that make their lives easier, more comfortable, and more convenient. Because it’s about time.

Frequently Asked Questions

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

The Elvie Portable Breast Milk Cooler holds up to 473ml or 16 ounces of breastmilk with the ice pack & 798 ml or 27 ounces without. (That's 3-4 pumping sessions' worth of milk on average.)

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.

What are the dimensions of the Cooler?

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

Can I pool milk from multiple sessions in the Cooler?

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

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.

Why does this product say Willow if I bought it from Elvie?

Great question! Exciting news: Willow and Elvie have officially joined forces to bring more mums the game-changing innovation they deserve 🤝 As a result, outside of the US, you may see some of our products are labelled as Elvie in Partnership with Willow.