Safety Material & No LeakingOur hot water bottle is made of high-quality rubber, which is anti-aging, durable, and has good sealing performance. Rubber material ensures maximum safety and perfect heat transfer, keeps the water warm for a longer time.The screw cap helps prevent the bottle from leaking. Waist belt designed with super soft double insert for keeping warm to your hands and waist at the same time, and provides gentle heating to prevent the heat from contacting your skin directly, which can cause burns. Keep Warm & Pain ReliefThe hot water bottle can be used to warm hands, neck, waist, back, shoulder, legs etc. It is very helpful to relieve the pain of minor diseases such as muscle aches, backaches, menstrual cramps, arthritis pain, etc. It can also be used as a cold compress or reduce swelling in children with fever. You can adjust the length of your waist according to your needs . Wide Nozzle to Fill WaterWith wide nozzle , the hot water can easily to fill, comes with an anti-squirt stopper, safety and easily let water in and out, prevent water spitting back out. Our hot water bottle maximum capacity 1000ml, suggested to fill to 2/3. (Tips: When filling, hold the neck of the bottle in an upright position, pouring slowly and carefully to avoid hot water splashing back)