A. Features 1. These gel packs are filled with polymer compound powder, which is clean, non - toxic, safe and environmentally friendly. 2. The powder inside the bag can quickly absorb moisture and turn into a gel with a certain elasticity, which can be used as a refrigerant. 3. The water inlet is designed with a self - sealing structure, so the gel is less likely to leak out. 4. It is easy to carry, convenient to use, reusable, not easily damaged, with a simple and beautiful appearance and quite practical. 5. It is often used in portable refrigerators to keep food fresh, or as a cold compress pack to relieve pain from minor injuries. It can also be used in thermal insulation transport containers to keep products at a low temperature during transportation. B. Specifications 1. **Bag material**: PE 2. **Capacity**: 200 ml, 400 ml, 600 ml (optional) 3. **Dimensions**: - 200 ml: 15×10 cm / 5.9×3.93 inches - 400 ml: 20×12 cm / 7.87×4.72 inches - 600 ml: 23×13 cm / 9.05×5.11 inches 4. **Quantity**: 10 pieces C. Instructions for Use 1. Open the water inlet of the gel pack and add an appropriate amount of water as needed. 2. Expel the excess air from the gel pack and then gently pinch the sealing opening. 3. After a few seconds, the powder will react with water and turn into a gel. The gel is less likely to flow out from the water inlet, but avoid over - squeezing or pressing it, and keep it away from sharp objects. 4. Put the product in the refrigerator for 4 to 5 hours until it freezes into a block, and then take it out for use. 5. During use, the gel pack will gradually thaw and finally return to a gel state. You can put it in the refrigerator again for future use. D. Precautions 1. This product is non - toxic, but the internal substances are not for consumption. 2. Under normal circumstances, the internal gel is less likely to leak out, but avoid over - squeezing or pressing it. 3. Do not poke, scratch or cut the bag with sharp objects. E. Package Contents 10 gel packs