What is a thermos

- Jul 18, 2017-

Vacuum cup, Vacuum cup) is usually made of ceramic or stainless steel with Vacuum containers of water are made, the top cover, seal, Vacuum insulation blanket can make in inside the liquid such as water slow cooling, in order to achieve the purpose of heat preservation.

The thermos is developed from a thermos flask, which is the same as a thermos bottle, but just for the convenience of making a cup.