Product name: outdoor ice box Insulation material: PU foam Shell material: polyethylene Inner tank material: PP Cooling time: 48H Heating time: 4~6H Capacity: 12L Suitable for: essential portable thermal insulation equipment for offices, homes, camping, fishing and other occasions. The inner tank is food grade and can hold various foods such as drinks, cakes, medicines, breast milk, daily meals, and even fish bait. Thickened polyethylene temperature lock ✅Thermal insulation performance (water temperature drops to 30℃): 12-24 hours ✅Cold retention performance (ice is completely thawed): 48-72 hours