Specification: Status: 100% new Item type: Hot water bottle Material: Silicone + PC Color: as shown in the pictures Approximate weight: 182 g/6.4 ounces Water injection: 3/4 is suitable Water injection temperature: around 80 ℃ is appropriate Microwave heating time: no more than 2 minutes Wide mouth design, easy to inject water Diameter: 25 mm/1 inch Easy to clean and inject water, leaving no scale PC screw cap sealed leak-proof, waterproof seal, no leaks Instructions: Avoid direct filling with boiling water, preferably around 80 ℃, and avoid contact with acidic/alkaline/greasy substances. 3/4 of the water should be filled, and the combination of hot water bag and fabric cover is better. Air will be released after water filling. Tighten the screw cap and squeeze the bag body by hand to check for leaks. Choose mild detergents such as dishwashing liquid for cleaning. Package list: 1 hot water bottle. 1 instruction manual.