- Advanced thermoplastic material retains heat longer than traditional hot water bottles. It also doubles as an ice pack or cold water bottle for versatile use. - Important: Do not heat the hot water bottle in the microwave. Fill it with hot water only up to two-thirds of its capacity. Always tighten the lid after deflating to prevent burns. - Designed for comfort and effectiveness, this classic hot water bottle alleviates sore muscles, stress, cramps, arthritis, neck stiffness, lower back pain, and menstrual discomfort. It also serves as a cold compress for fevers or to reduce swelling from minor injuries. - Features an elegant lid that prevents direct contact with hot rubber, minimizing burn risk while enhancing the aesthetic appeal. It is recommended to replace the rubber bottle after two years of use and to regularly inspect the cap for wear. - Ideal for use at home, in the office, or while traveling. Perfect for cozy nights on the couch, soothing aches after a workout, or providing comfort during menstrual cycles.