High -quality materials: made of thicker rubber materials, non -toxic, tasteless and recyclable, and more environmentally friendly. Cool and calories: Warm up in cold winter to keep you calm in hot summer, non -slip and flashing surfaces with mesh structure, thereby ensuring the greatest security and transmitting calories well. With a soft wool cover, it can prevent direct contact with the skin and keep warm. The design of no leakage -you can use this hot bag fully with confidence, because it has a tight screw cover to ensure the best protection and leakage experience in the process of use. (Full of only 3/4 of the water capacity. Do not fully fill boiling water. The water temperature should not exceed 80 degrees) Multi -function: It can be used as a hot water bottle, or it can be used as an ice pack or cold water bottle. Heating assistant to heating bed on a comfortable night. This hot water bottle with fluffy cover is the best choice for gifts.