1.Safe & Durable - Made of rubber to ensure maximum safety and transfer the heat perfectly, keeps the water warm for a long time. To be more safe, the temperature of hot water should not exceed 80 degrees celsius. 2.Wide Bottle Nozzle - Comes with an anti-squirt stopper, very safe and easy to let water in and out, and prevent water spitting back out. 3.Comfortable Plush Waist Cover - Comes with a plush waist cover, designed with super soft double insert for keeping warm to your hands and waist at the same time. And preventing the heat from touching your skin directly, which can cause burn. 4.Widely Used- Hot water bottle bag works great for pain relieving, arthritis, sports injuries. Hot therapy helps to relax your tired muscles and tensed shoulders from stress and too much workout. Also can be used for cold therapy, easy fill in cold water or crushed ice. 5.Great Gift Idea - Hot water bottle can be used as cold compress for kids with fever. And support to improve blood circulation, ease menstrual pain and feel more relax during the special period. A must have Christmas gift for friends and family in cold weather.