Quality Material:The main material of the product is Silica gel material, rotating bottle cap to prevent leakage of hot water.Explosion-proof and scald-proof using high-temperature pressure shaping technology.One second rebound without deformation,Can be heated in the microwave. Small and Portable:Size,10.3cm * 16cm,Capacity: 320ml, size suitable for all adults and school children,Gently pour in hot water, make sure the water temperature is not too hot (below 80 C), pour two-thirds of the hot water bottle is better, keep away from children and your own face while watering. Warm Hot Water Bag Cover:Comforting,gorgeous,removable, washable.Knitted heater for better insulation that scalds the hand with hot water.Available Microwave oven heating.Do not pour in freshly cooked water.Keep children away if you pour hot water in them. Multiple-Purpose:Hot water bottles are suitable for heat therapy.For example, for cold feet, non-inflammatory joint pain, cramps, abdominal pain and period pain. There are two hot water bottles that are very suitable to be shared with your families. Warm Gift at Cold Night:Hand Warmer is an ideal Christmas,birthday,new year gift for kids,girls,boys,men and women parents,friends and your loved ones at long cold winter nights.It can be used to keep warm or treat diseases of the back and the rest of the body.