Keep You Warm for Long - Aikotoo rubber hot water bottle with cover is made from 100% natural rubber, which helps maintain liquid temperature and hold heat longer than traditional silicone hot water bottles. Fill the bottle with hot water and place it in bed up to 10 minutes before going to sleep. Our thermal hot water bottle creates a warm and comfortable sleep environment. Multifunctional Hot Water Bottle - The hot water bag can be used as a remedy for aches and pains, including back, neck, and shoulder pain, muscle soreness, menstrual cramps, and tension. In addition to hot therapy, it can also be used as a cold compress for fever or to help reduce swelling from minor injuries. Do not use the microwave for heating. Cute Protective Cover - Includes a soft, removable knit cover that helps insulate heat and extend warmth for 6 to 8 hours. The cover protects the bottle from damage and dirt, helping it last longer. The attractive pattern makes it a thoughtful and cozy gift for loved ones on occasions such as Mother's Day, Thanksgiving, Christmas, and New Year's Day. Easy to Use - Allow boiling water to cool slightly before pouring. Do not use boiling water. Hold the neck of the bottle and fill slowly up to 2/3 full. Press out excess air slowly and securely tighten the screw cap. Check for leaks before use. Package Includes: 1 Rubber Hot Water Bottle, 1 Soft Knit Cover. This hot water bottle is manufactured to BS 1970:2012 standards for maximum safety. Notice: Due to the natural rubber material, a slight odor may be present. This is normal. Avoid direct contact with skin immediately after filling with hot water to prevent discomfort or scalding. Use only with suitable water temperature for safe application.