Boon's FROSH milk chiller keeps milk chilled on the go. The compact size conveniently slips into a diaper bag or purse. Its double-wall vacuum seal maintains cold temperatures for up to 17 hours. Simply fill with ice water, then pour milk into the double-wall, vacuum-sealed stainless steel. This adaptable container holds 10, 14, or 24 ounces of breast milk. Plus, it's dishwasher-friendly and TSA compliant for air travel.