Keep breast milk and formula fresh with the chilling insert that cools milk on contact – simply fill the insert with ice or water and freeze to keep milk chilled. Pump throughout the day, adding milk as you go to just one convenient container. The Milk Chiller will cool and keep your breast milk safe for 17 hours. Refrigerated or room-temperature breast milk and formula will stay fresh and cool for 24 hours. The large 20 oz. storage capacity holds a day’s worth of milk – enough for five 4oz. bottles. Designed for portability, you can stash it in your bag or carry it securely by the handle, safely transporting milk wherever you go. Its discreet design looks just like a tumbler and even fits most cupholders. The Milk Chiller is also convenient for nighttime pumpers; keeping it next to the bed provides reliable and safe storage throughout the night.