DescriptionMaterial: Eco-friendly Plastic (PE), Resin (Inner Side)Color: As the picture Size: 100ml,200ml,400ml Quantity: 5pcsUse Steps:Step 1: open the water inlet and add water according to the water line on the bagStep 2: to discharge the air in the cooler bag, seal the water inlet. Step 3: After a few minutes, the material in the cooling bag and the water react to the gel gel mixture. Step 4: put the prepared cooler bag in the refrigerator for 8-10 hours. Then it is frozen to an ice cube. Step 5: the cooling effect lasts for 10-24 hours. Step 6: just inject the water once and it can be used repeatedly. Once completely thawed, the jelly-like mixture will be restored. Reuse it by freezing. Repeat use more than 1000 times. The shelf life is 3 years for a new cooler bag and 1-2 years for a used cooler bag. Note:1.Do not place it together with hot objects.2.Avoid squeezing or touching sharp objects.3.It is not edible.4.Dispose of the damaged cooler bag and put away from children.