Glass refers to a cup made of glass, which is usually made of high borosilicate glass, and is fired at a high temperature of more than 600 degrees. It is a new environment-friendly tea cup and is increasingly favored by people. The glasses are divided into double layer glasses and single layer glasses. Their production processes are different. The double layer glasses mainly meet the needs of advertising cups. The logo of the company can be printed on the inner layer for promotional gifts or gifts, and the insulation effect is more outstanding. Sodium calcium glass water cup is also the most common glass water cup in our life. Its important components are silicon dioxide, sodium oxide and calcium oxide. The water cup is made by mechanism and manual blowing, and the price is low. If soda lime glassware is used for drinking hot drinks, it usually needs to be tempered when leaving the factory, otherwise the cup will crack when the temperature difference is too large.

High borosilicate glass water cup, which is named for its high content of boron oxide. The tea set and teapot commonly used for making tea can withstand the change of large temperature difference without breaking. However, this kind of glass looks light, light and feels bad. Crystal glass water cup, which belongs to the high-end product of glass, is called crystal glass because it contains many metal elements and its refractive index and permeability are very close to natural crystal. There are two kinds of crystal glass, lead crystal glass and lead-free crystal glass. Lead crystal glass is not recommended to be eaten, especially when drinking acidic drinks from water cups. Lead elements will dissolve into acidic liquids, and lead poisoning will occur if taken for a long time. Lead free crystal is lead-free and harmless to the body.