Safe material, no leaksOur hot water bottles are made of high quality rubber that is age resistant, durable and has a good seal. The rubber material ensures maximum safety and perfect heat transfer so that the water stays warmer for longer. The screw cap helps prevent the bottle from leaking. Comes with a 2-piece protective cover Comes with 1 waist warmer and 1 hot water bottle cover. Designed with super soft double inserts, the belt keeps your hands and waist warm at the same time and provides gentle heating to prevent the heat from coming into direct contact with your skin and causing burns. Keeps you warm and relieves painThe hot water bottle can be used to warm your hands, neck, waist, back, shoulders, legs and more. It is very helpful in relieving muscle aches, back pain, pain from minor ailments such as menstrual cramps, arthritis pain etc. It can also be used as a cold compress for children with fever or to reduce swelling. You can adjust the waist length as required (maximum length 110 cm). Wide nozzle filling With its wide nozzle, hot water can be filled easily with a spout-proof stopper that safely and easily lets water in and out and prevents it from spitting out. Our hot water bottles have a maximum capacity of 1000 ml and are recommended for filling up to 2/3 of the bottle. (A word of advice: when filling, hold the bottle upright by the neck and pour slowly and carefully so that the hot water does not spill back out.) With a spout-proof stopper, the water is safe and easy to get in and out, preventing spitting. Our hot water bottles have a maximum capacity of 1000 ml and are recommended to be filled up to 2/3. (Warm tip: when filling, hold the bottle neck upright and pour slowly and carefully to avoid spilling back the hot water) With a spout-proof stopper, it is safe and easy to let the water in and out, preventing spitting. Our hot water bottles have a maximum capacity of 1000 ml and are recommended to be filled up to 2/3 of the capacity. (Warm tip: when filling, hold the bottle upright by the neck and pour slowly and carefully to avoid spilling back the hot water)