Description The breastmilk cooler bag is made of polyester material. It can hold baby milk bottles. Durably constructed with insulated lining, keeps your breast milk fresh by maintaining the right temperature for hours. After baby growing up, also can be used as a picnic bag, lunch bag, beer cooler bag. Features -Material:Polyester -Effectively keep bottles stay cold, warm or fresh for hours, lock in nutrients and protect babys food.-It is equivalent to a small mobile refrigerator have a long-term preservation time to keep your breast milk fresh. -A perfect helper to keep the milk and yourmealfresh when outing, no longer worrying about baby will hungry outside.-Insulation effect will be doubled when in use with ice pack, suit on-the go or nursing mom at work or outdoors.-Double warehouse design, upper and lower two floors, increasing capacity tomeet all the demands. Packing list: 1 x bag