Is it better to drink from a glass or a ceramic cup?

At present, there are two kinds of crystal glasses in circulation on the market: lead-free crystal glass and lead-containing crystal glass. The former generally contains potassium, most of which are high-grade handicrafts and are marked on the outer packaging; The latter contains lead, that is, crystal glassware, which is common in some supermarkets and stalls, and its lead oxide content can reach 24%. In daily life, lead ions may form soluble lead salts, which are seriously harmful to health, as drinks or food are consumed by the human body. In addition, some glasses are painted with various colors. Although they are beautiful, they contain harmful or even highly toxic elements, such as heavy metals such as lead, chromium, cadmium, nickel, copper, manganese, and other non-metals such as arsenic, fluorine, chlorine, sulfur.
The ceramic water cup is non-toxic, because it is made of clay after being fired at high temperature. As long as it is not collected in areas with high heavy metal content and high radiation, there is no problem. However, some ceramics need to be colored before firing. Generally, the colored raw materials are chemical raw materials, which are not safe. The so-called poison of ceramics mainly refers to the dissolution of lead and cadmium. Generally speaking, in order to make the surface of ceramic cup beautiful, the surface is usually decorated with color patterns, and lead and cadmium are mainly introduced by these colors.
The ceramic cups of regular manufacturers are strictly tested, and their lead and cadmium dissolution are in line with the national mandatory standards, so they are safe and reliable. If you want to buy them, you’d better buy white cups or cups with simple patterns and colors.