The wide mouth design helps prevent burns while filling with water and allows for easy, quick, and safe pouring into the hot water bottle without spills. Compared to rubber thermos and recyclable thermoplastic materials, advanced thermoplastic can retain heat for up to 8 hours and can also be used as a cold pack or water heating bag. Non-rechargeable thermos bottles are more portable and can be used safely in any location. This hot water bottle is made from thicker materials, offering a longer lifespan than traditional hot water bottles, making it durable, eco-friendly, and cost-effective. The wide mouth design makes filling water easier, and it is convenient to carry without the need for recharging. It provides relief from menstrual cramps, muscle soreness, and pain in various body parts. Keep warm in winter and cool in summer. Ensure compatibility by entering your model number.