Practicality: The temperature of the hot water can be at least about 3 hours under normal temperature. When it is placed in the bed for ten minutes, the bed will warm. Put it in the quilt and temperature can be saved all night. Let the hot water warm your winter. Material of hot water :Liner 1.8L Rubber,anti-aging, lasting insulation,the plush jacket of the hot water is and comfortable. Multi-scenario use:Can be used for warm hands, warm neck, warm waist, warm back and so on. It can you with a warm bed after you put the hot water in the bed shortly going to bed. It is also a perfect gift! Energy-saving and Customer service: environmentally friendly and safe, the hot water is water-filled and there is no leakage or leakage.Friendly customer service, if you have any product problems, to contact us. Material:Rubber + plush colour:Dark gray Package Contents: 1 x Hot water Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.