1. Spiral Design: Spiral lid, smoothly twisted to close intact, to ensure that the warmth is retained without damage, to ensure the greatest degree of safety, and to keep the water temperature longer.2. Best Assistance: The cute cartoon hot water bottle has a edge and the surface temperature will not be too high, making it easy to operate. It is suitable for the treatment of muscle soreness, cramps and pain.3. Easy To Use: The safe hot water bottle has a wide mouth, which is easy to hold hot water, is small and portable, soft and comfortable, and brings warmth to your hands and waist, keeps warm and prevents leakage.4. Layers Of Protection: The cute and individual hot water bottle is protected from the , the materials are selected layer by layer, strictly controlled, and the heat insulation layer is implanted inside.5. Safe And Leak Free: Comfortable and warm hot water bottle with large threaded stopper, seam and waterproof mouth, sealed and leak proof, super large capacity 500ml, it is recommended to fill two thirds of it.Spec:Item Type: Hot Water BottleMaterial: PVCOutdoor: 2-3 HoursRoom Temperature: 3-5 HoursBedding: 8-12 HoursCapacity: 500mlHow to Use:1. Roll up the liner and stuff it into the cloth cover2. Unscrew the threaded water plug3. Fill in 2/3 of hot water4. Drain the excess air in the hot water bottle5. Tighten the threaded water plug6. Turn it upside down to see if it is leakingPackage List:1 x Warm Water Bag