Features: These gel packs are filled with high polymeric compound power which is clean, non-toxic, safe and eco-friendly. The powder inside bag will rapidly absorb water and become gel that has certain elasticity and used as refrigerant. Water inlet is designed with self-sealing structure so gel will not flow out. Easy to carry, convenient to use, reusable, not easy to damage, concise, beautiful and quite practical. Commonly used to keep food cool in portable coolers, or as a cold compress to alleviate the pain of minor injuries; or in insulated shipping containers to keep products cool during transport. Specifications: Bag Material: PE Capacity: 200ml, 400ml, 600ml(Optional) Size: 200ml: 15 x 10cm / 5.9 x 3.93" 400ml: 20 x 12cm / 7.87 x 4.72" 600ml: 23 x 13cm / 9.05 x 5.11" Quantity: 10 Instruction: 1, Open the water inlet of gel pack and put some water in according to your need. 2, Discharge excess air inside the gel pack then lightly pinch sealing to close. 3, After a few seconds, power and water react and become gel. Gel will not flow out from the water inlet, but don't squeeze or press it too hard or contact with sharp objects. 4, Put this product in fridge for 4 to 5 hours till it freeze into a lump then take it out to use. 5, During use, gel packs will gradually unfreeze and recover back to gel form finally, and you can once again put it into fridge for next time use. Note: 1, This product is non-toxic, and its inside content is inedible. 2, Normally the inside gel will not flow out, but do not squeeze or press it too hard, please. 3, Do not poke, scratch or cut the bag with sharp objects, please. Package Includes: 10 x Gel Packs