Refillable Plush Hot Water Bottle Belt with Plush Hip Cover - Key benefit: keeps hands and the waist warm with a plush hip cover and a super-soft double insert, making warmth comfortable and easy to wear. - High quality and durable materials: the hot water bottle uses rubber for safe heat transfer and reliable durability, helping the water stay warm longer. For safety, do not exceed 80 C water temperature. - Multifunctional use: ideal for pain relief, arthritis, and sports injuries. Heat therapy helps relax tired muscles and stiff shoulders from stress or overtraining. Can also be used for cold therapy by filling with cold water or crushed ice. - Practical design: wide-mouth bottle with a spill-proof stopper to prevent leaks. Maximum capacity is 900 ml; fill up to two-thirds for best performance. - Use scenarios: at the desk or lounging at home to warm your core and lower back; after workouts to loosen shoulders and back muscles; during travel or long drives for ongoing warmth or gentle relief from minor pains.