- Advanced thermoplastic material retains heat longer than traditional hot water bottles, making it ideal for soothing sore muscles and alleviating discomfort. It can also double as an ice pack or cold water bottle for versatile use. - Note: This hot water bottle is not microwave-safe. Fill it with hot water not exceeding two-thirds of its capacity. After deflating, securely tighten the lid to prevent burns. - Designed for comfort and functionality, this classic hot water bottle is perfect for relieving muscle tension, stress, cramps, arthritis pain, and stiffness in the neck and lower back. It is also effective as a cold compress for fever reduction and swelling from minor injuries. - Comes with an elegant lid that protects your skin from direct contact with hot rubber, enhancing safety and style. For optimal performance, replace the rubber bottle after two years of use and regularly check the cap for wear. - Practical use scenarios include: 1. Applying heat to relieve menstrual cramps and promote relaxation. 2. Using as a cold compress to reduce swelling after sports injuries. 3. Providing soothing warmth for chilly nights or stressful days. Choose this hot water bottle for reliable comfort and versatile applications in managing everyday pain and discomfort.