- Premium Quality Thermos Bottle with Lid : Constructed from durable and safe rubber, this thermos guarantees long-lasting performance. Our heat packs undergo rigorous testing and utilize high-density rubber material, providing superior heat retention compared to traditional options. - Comfortable Plush Waist Cover : The thermos bottle features an insulating cover made of artificial plush to prevent burns from direct contact. This versatile heat pack not only warms your core but can also be used to warm your hands, making it ideal for family use during chilly winters. Perfect for cozying up in bed or keeping warm on outdoor adventures. - Safety First : Always use the insulating cover when filling the heat pack with hot water to avoid burns. We recommend filling it to a maximum of 2/3 capacity. Equipped with a release valve for safe and easy water entry and exit. Tip: Use water heated to 80-90 degrees Celsius for optimal results. - Versatile Usage : This heat pack is ideal for alleviating various types of pain, including menstrual cramps, back pain, shoulder and neck discomfort, and muscle soreness. It serves as an effective thermos bottle in any setting—at home, in the office, or outdoors. Additionally, it can be used as an ice pack or a cold water bottle, enhancing its utility. - Key Attributes : Functional and adaptable, this thermos emphasizes compatibility with your lifestyle. The combination of durable materials and thoughtful design ensures excellent performance and safety in all scenarios.