- Experience longer-lasting heat retention with our advanced thermoplastic hot water bottle, outperforming traditional options. It also doubles as an ice pack or cold water bottle for versatile use. - Important: Do not heat this hot water bottle in the microwave. Fill it with hot water no more than two-thirds of its capacity. After deflating, securely tighten the lid to prevent burns. - This classic hot water bottle design is perfect for alleviating sore muscles, stress, cramps, arthritis, and neck or lower back pain. It can also serve as a cold compress for fevers or to reduce swelling from minor injuries. - The elegant lid ensures that the rubber does not come into direct contact with your skin, minimizing the risk of burns while adding a chic touch. For safety, replace the rubber bottle every two years and regularly check the cap for wear. - Ideal for various scenarios: 1. Use it during the winter months to keep warm in bed. 2. Apply it to soothe menstrual cramps or muscle soreness after workouts. 3. Utilize as a cold compress for minor injuries or to alleviate fever symptoms.