Glass can be divided into single glass, double glass, crystal glass, glass office cup, glass cup, automobile cup. Double glass, glass in the production time is divided into two layers, when in use can play a role in anti-hot heat. Double glass raw material is borosilicate glass, food grade food grade glass, after more than 600 degree heat baked, usually made from borosilicate glass tubes, inside and outside the pipe size after baking under technician sealing machine together, is a new environmentally friendly cup, more and more people of all ages. From the style on the sub, cup and mug (with handle); From the material point, the use of a common cup glass tubes and pipes crystal glass tube; points from the production process, there is a tail and double bunk no tail, a tail at the bottom of the cup there is a small double glass drops spotting; tailless glass is flat, no more than point. To distinguish from the cup, the cup has a standard, high-mouth glass (filter deeper, more reasonable, does not touch water filter) from the bottom of the cup on the distinction between ordinary thin crust, thick round, thick straight bottom, Crystal bottom.