- Experience longer-lasting warmth with our advanced thermoplastic hot water bottle, which retains heat more effectively than traditional models. It also doubles 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 up to two-thirds of its capacity. Always secure the lid tightly after deflating to prevent burns. - The timeless design makes it ideal for soothing sore muscles, alleviating stress, easing cramps, and providing relief from arthritis, neck stiffness, and lower back pain. It also serves as a cold compress for fevers or to reduce swelling from minor injuries. - Equipped with an elegant lid, this bottle prevents direct contact with hot rubber, reducing the risk of burns while adding a stylish touch. Please replace the rubber bottle after two years of use and regularly check the cap for wear. - Ideal for home use, this hot water bottle can be a comforting companion during chilly nights, a stress-relieving aid after a long day, or a thoughtful gift for women experiencing menstrual discomfort.