Many people are not so satisfied with the color and texture of ordinary glass, so they like crystal glass. Due to the addition of lead, this crystal is crystal clear. Although there is lead in crystal glass, the lead used to hold water will not precipitate. Double glass can not only drink two kinds of drinks, but also has a gap in the middle, which can play a role in heat insulation.
Advantages and disadvantages of other cups:
1, plastic cup:
Inferior plastic, pouring hot water will definitely release toxic substances, so the most important choice of plastic cups is to choose food-grade plastic materials that meet national standards. It is best to clean the plastic cup with baking soda before using it for the first time. Because there are many holes in the plastic cup, if the dirt is not cleaned up, it is particularly easy to breed bacteria.
2, enamel cup:
Because enamel is a kind of composite material which is coated with one or several layers of enamel on the surface of metal, and the two are firmly combined through physical and chemical reactions through firing. The enamel cup does not contain harmful substances such as lead, so it is very convenient to carry and clean. But if it is damaged, it should be thrown away quickly, because harmful substances will be precipitated when it is used to hold drinks after damage.
3, ceramic cups:
Most mugs are made of ceramic, and you can't put it down in all colors and styles. But Bian Xiao wants to tell you today: Try not to use cups coated with colored glaze. The inner wall of colored ceramic cups is usually coated with a layer of glaze. When it comes to boiling water and drinks with high pH, the toxic elements of heavy metals such as aluminum in the glaze are easy to precipitate.