Safe and explosion-proof: Knitted fabric design flush & use, so convenient, there is no leakage of dangerous insulation lastingThe hot water bottle use high quality materials thickened version of rubber, heat resistance to aging, insulation more durable environmental protectionNo smell: natural rubber, strong elastic insulation waterproof.Note:1.Do not use boiling water Fill not more than 2/3 full and expel air ensure stopper is securely fixed stopper empty and with stopper removed.2.Warning-hot water bottles can cause burning avoid prolonged direct contact with the skin.