- Advanced thermoplastic material retains heat longer than traditional hot water bottles, also serving as an ice pack or cold water bottle for versatile use. - Note: This hot water bottle is not microwave safe. Fill with hot water not exceeding two-thirds of its capacity. Ensure to expel air and securely tighten the cap to prevent burns. - Classic design effectively alleviates muscle aches, stress, cramps, arthritis, and lower back pain. It is suitable for menstrual cramps and can double as a cold compress for fevers or to reduce swelling from minor injuries. - Features a stylish hot water bottle cap that prevents direct contact between hot rubber and skin, minimizing burn risk while adding a touch of elegance. The rubber should be replaced after two years of use, and regular checks on the cap's condition are advised. - Ideal for soothing discomfort during cold winter nights, providing relief after exercise, or comforting during menstrual cycles. Perfect for personal use or as a thoughtful gift for friends and family.