- Advanced thermoplastic material retains heat longer than traditional hot water bottles, offering effective relief for sore muscles, cramps, and arthritis. It also doubles as an ice pack or cold water bottle for versatile use. - Important: This hot water bottle cannot be heated in the microwave. Fill it with hot water no more than two-thirds of its capacity. After deflating, ensure the lid is tightened to prevent burns. - Classic design features an elegant hot water bag lid, preventing direct contact with hot rubber and enhancing safety. It adds a chic touch while being functional. - Ideal for various scenarios: - Relieve menstrual cramps and lower back pain after a long day. - Soothe sore muscles and stiffness in the neck from physical activity. - Use as a cold compress to reduce swelling from minor injuries or to alleviate fever. - Made for durability, the rubber should be replaced after two years of use. Regularly check the wear of the cap for safety. - Size and compatibility: Designed to fit comfortably in your hands while providing ample surface area for effective heat or cold application. Experience the comforting benefits of this versatile hot water bottle, engineered for performance and safety.