Durability and safety: the KUYOU hot water bottle is made of rubber to ensure maximum safety and transfer heat perfectly. It keeps the water hot for longer. For safety reasons, the temperature of the hot water should not exceed 80 degrees Celsius. Wide mouth for bottles: equipped with an anti-splash stopper that makes water entry and exit safe and easy. Prevents water from spilling out again. Our hot water bottle with a maximum capacity of 900 ml should be filled two-thirds full. Nice plush cover: with a taillenbezug cover with super soft Doppeleinsatz, which at the same time keeps hands and waist warm. Prevents heat from reaching your skin directly and causing burns. Excellent thermal therapy: our hot water bottle is ideal for relieving pain, arthritis, and sports injuries. Heat therapy helps relax tired muscles and tense shoulders from stress and overtraining. They can also be used for cold therapies, to easily fill with cold water or ice. Nice gift and random color: the hot water bottle is sent in a random color, you may receive 1 unit in pink, blue, or yellow. It can be used as a cold compress for children with fever. Helps improve blood circulation, relieve menstrual discomfort, and feel relaxed during special times.