The raw material of the double glass is high borosilicate glass, food grade catering glass, which is fired at a high temperature of more than 600 degrees. Usually, the double glass is made of high borosilicate glass tube, large and small inner and outer tubes, which are baked by technicians under the sealing machine. It is a new type of environment-friendly tea cup and is increasingly favored by people.

From the style, cup and office cup (with handle);

From the material point of view, the cup tube used includes ordinary glass tube and crystal glass tube;

From the perspective of production technology, there are double layer glasses with tail and double layer glasses without tail. The double layer glasses with tail have a small drop sample at the bottom of the glass; The tailless glass is flat and has no residue.

Distinguished from the cup mouth, there are standard cup mouth and high mouth glass (the filter screen is deeper, the design is more reasonable, and drinking water will not touch the filter screen).

From the bottom of the cup, it can be divided into ordinary thin bottom, thick round bottom, thick straight bottom and crystal bottom.