Cold preservation General ice pack. Can be used as a mobile refrigerator for frozen drinks, milk, juice,, fruit, seafood, etc. In addition to the transportation of drugs, vaccines, etc.2, heat preservation is generally used for insulation food, lunch, restaurant delivery, outings. . .Carrying method: portable / one shoulder / cross bodyUse range: 1, cold preservation is generally called ice pack, can be used as a mobile refrigerator for the preservation of milk, tea, seafood and other foods. Outdoor work/outing travel/climbing/carrying iced drinks, fruits, cold drinks, etc., no need to endure warm drinks in hot summer days! It is also used for refrigerated transportation of medicines, vaccines and other products.2, heat preservation is generally used for insulation food, lunch, lunch, can also be used for outing, camping, primary and secondary school students, white tie meals!