CeramDrinking glass is the most common commodity, but there are too many types. As far as cup materials are concerned, glass cups, enamel cups, ceramic cups, plastic cups, stainless steel cups, paper cups, etc. are common. So, how to choose a safe drinking glass suitable for drinking?
Glass: the first choice for drinking glasses
The first choice for drinking glasses should be glasses, especially for office and home users. Glass is not only transparent and beautiful, but of all materials, glass is the most healthy and safe. The glass is made of inorganic silicates. It does not contain organic chemicals during the firing process. When people drink water or other drinks in the glass, there is no need to worry about the chemicals being drunk into the belly. ; And the glass surface is smooth, easy to clean, bacteria and dirt are not easy to breed on the wall of the cup, so people drink water from the glass is the healthiest and safest.
The only thing to note is that the glass is most afraid of thermal expansion and contraction, and the temperature of the glass is too low (such as just taken out from the refrigerator, just brought in from the cold outside), do not put hot water immediately to prevent bursting.
Plastic cup: choose food grade plastic
In recent years, plastic cups have been loved by many people because of their changeable shape, bright colors, and fear-free characteristics. They are very suitable for outdoor users and office workers, but the problem of plastic cups is very common. In fact, plastic is a polymer chemical material. When a cup of hot water or boiling water is used in a plastic cup, the polymer will easily precipitate and dissolve into the water, which is harmful to human health after drinking. And the internal microstructure of the plastic has a lot of pores, in which dirt is hidden, and bacteria will grow if it is not cleaned. Therefore, the selection of plastic cups is very important for the selection of plastic materials. Food grade plastics that meet national standards must be selected.
Generally speaking, the bottom of the plastic cup has a logo, which is the number on the small triangle, the common is "05", which means that the material of the cup is PP (polypropylene). The cup made of PP has good heat resistance, the melting point is between 170℃ and 172℃, and its chemical properties are relatively stable. It is stable to various chemical reagents except being corroded by concentrated sulfuric acid and concentrated nitric acid.
