Stainless steel thermos flask

- Sep 21, 2019-

Insulated bottle bladder is made of stainless steel or non-toxic and odorless plastic. Metal bottle gallbladder durable, not easy to damage, but the thermal conductivity is much greater than glass, made of bottle gallbladder insulation efficiency is slightly poor. Single-layer or double-layer wall container made of plastic, filled with foam plastic insulation, light and convenient, not easy to break, but the insulation efficiency is worse than the vacuum bottle.