About this item KEEPS YOU WARM FOR LONG TIME - The hot water bottle is 100% natural rubber, which helps maintain liquid temperature and retain heat longer than traditional silicone hot water bottles. Multifunctional Hot Water Bottles- The hot water bag can be used alone as a treatment for aches, pains and sports injuries, such as back, neck and shoulder pain, muscle aches, menstrual cramps and tension (quiet period pain). Besides traditional hot therapy, it can also double as a cold compress for kids with fever or to reduce swelling from minor injuries, the hot water bottle is a thoughtful and warm gift for your mom, dad, kids and friends on Mother's Day, Thanksgiving Day, Christmas and New Year. EASY TO USE - Allow boiling water to cool slightly before pouring (do not use boiling water). Hold the neck of the hot water bottle.