Baby Brezza's NEW 24 Hour Breastmilk Cooler keeps your "liquid gold" at a safe, cold temperature for up to 24 hours - no longer worry that your breastmilk won't stay cold between pumping and refrigerating or freezing! This revolutionary new breastmilk cooling system holds up to 20 oz of breastmilk - meaning it can accommodate milk from up to 4 pumping sessions on average! The double-insulated stainless steel thermos holds two 360° ice packs that fully surround two 10 oz reusable milk storage bottles, ensuring breastmilk remains cold until you can refrigerate or freeze it and preserving its freshness and nutrients at home or on-the-go. It's easy to use - first, freeze the ice packs, then slide the frozen ice packs inside the stainless steel thermos. Simply add the milk storage bottles to keep milk safely chilled for an entire day! (Based on lab testing measuring the time that the coolers maintain breastmilk temperature at refrigerated levels). The internal milk storage bottles are dishwasher-safe and can also be safely used in the Bottle Washer Pro or any Baby Brezza Sterilizer Dryer. Features a built-in carry handle and twist-on/off lid for convenience and portability on the go, while traveling, or just at home between pumping sessions and a trip to the kitchen! You can also feed your baby with the milk storage bottles if you're using Avent Classic nipples, minimizing waste and mess during transfer. This portable breast milk chiller is FSA/HSA eligible and PVC/Lead/Phthalate/Cadmium-FREE. Available in 3 fashionable colors (Black, Soft White, Sage). 1 year limited warranty (not valid if shipped outside the US).