The design of the double-layer glass greatly reduces the thermal conductivity of the cup body, which can effectively play a role in heat insulation and anti-scalding when used. The double-layer structure principle is used to improve the comfort of the cup and the heat preservation effect of the glass, in addition to the humanized design In addition, there is also a good aesthetic value. The transparent manufacturing material combined with the double-layer structure almost sublimates tea drinking into a dynamic artistic behavior， glass pot with lid  .
       The double-layer glass cup is usually blown by hand, has the function of heat preservation and heat insulation, and can also store ice cubes. If the middle layer is not a vacuum cup, there is an air outlet hole at the bottom of the outer layer to discharge gas during the blowing process and prevent The cup is deformed and cracked. If there is a vacuum, the cup will make a loud noise when it is broken, and it will blow up the glass fragments, which can easily hurt people.
       Glass is widely used in modern times and has always been a product in great demand. By using specific processing methods, we can not only give full play to the characteristics of glass, but also make up for its defects, and are no longer restricted by the natural properties of glass.