Safe and Leak-Proof: The non-toxic hot water bottle is made of new anti-aging rubber, longer lasting than conventional rubber bottles. Ensure maximum safety and transfer heat perfectly. Passed pneumatic pressure test, 24-hour swing test. It is completely pressure-resistant and leak-proof. .Keeps You Warm for a Long Time: The hot water bottle with cover retains heat and is a great environmentally friendly alternative to a heating pad. The soft covers distribute the heat evenly and accompany you and your family through the cold winter, also ideal as a hand and bed warmer. .Easy to Use: Wide bottle nozzle comes with a splash-proof stopper, safe and allows water to flow easily in and out to prevent water from splashing out. Our hot water bottle has a maximum capacity of 1000 ml; it is recommended to fill it two-thirds full. Caution: Safe for babies and children. An adult should always supervise and never fill with boiling water.Multifunctional use: Hot water bag, you can use it at home, in the office, or outdoors. It works great for back and neck pain, arthritis, and sports injuries. In addition, the hot therapy helps relax your tired muscles and tense shoulders from stress and overexertion. It can also be used for cold therapy; simply fill it with cold water or crushed ice.