gel cooler packs 1.Certificate:CE,MSDS,SGS,EN71-3 2.Material: ... 2.Function:a).For refrigerator: it can save electricity, keep food fresh and keep cold incondition of refrigerator being off electricity ... product and other kinds of food,drugbiological product,plasma, vaccine.c).For food: freeze and keep fresh food, beverage, beer, fruit, vegetable ... it and turn to doctor when necessary. gel cooler packs