There is a very important part in the double-layer glass, which is the sealing ring, which directly affects whether the cup will leak, glass pot with lid，and its material directly affects people's health. The double-layer glass sealing ring is so important, so how to choose it?
　　First of all, the material of the sealing ring of the general double-layer glass should be food-grade silica gel, which is non-toxic, tasteless, heat-resistant, soft and elastic. Needless to say, it is non-toxic and tasteless. The heat resistance of the sealing ring should be high, because the cup is filled with high-temperature boiling water, and it will not be deformed, so that it can play a sealing role. In addition, the sealing ring must be soft and elastic to be more easily placed in the inner slot of the double-layer glass lid, and the waterproof sealing effect is better.

　　 The choice of double-layer glass depends not only on the price, but more importantly, the material of each component. Only the details can reflect the value. If you can choose a good sealing ring, the glass must not be cheap.