According to Baidu Experience. com, the base of double glass is integrated, but the side wall is double and the base is a whole piece.

Double-layer glass, as its name implies, is the glass that is divided into two layers when it is made, which can play the role of heat insulation and scald prevention when it is used. Classification of double-layer glass The raw materials of double-layer glass are high borosilicate glass and food-grade dining glass, which are fired at a high temperature of more than 600 degrees. Usually, it is made of high borosilicate glass tubes baked by technicians under a sealing machine, and large and small internal and external tubes. It is a new type of environmental protection teacup, which is favored by people more and more.