1. Glass: Glass contains no organic chemicals during firing. When people drink water or other drinks from cups, they don't have to worry about chemicals being drunk into their stomachs. Moreover, the glass surface is smooth and easy to clean, so drinking water from a glass is the healthiest and safest.
2. Ceramic cups: There are two kinds of ceramic cups. One is that the inner wall of colorless glaze is colorless, and the other is multicolored glaze. Ceramic cups coated with colorless glaze, especially the inner wall should be colorless, is also the first choice for drinking water. This material is not only safe and resistant to high temperature, but also has a good thermal insulation effect. Drinking hot water or tea is a good choice.
The beautiful colors and lovely patterns on the water cup may hide potential safety hazards. When the cup is filled with boiled water or drinks with high pH, toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid, which will cause harm to the human body.
A cup unfit for drinking.
1, plastic cups are the easiest to hide dirt and shelter evil people.
Plastic cups should also be a kind of unpopular. Because plasticizers are often added to plastics, plastics contain some toxic chemicals. When hot water or boiled water is filled in plastic cups, the toxic chemicals are easily diluted into water. There are many pores in the internal microstructure of plastics, which hide dirt. If it is not cleaned, bacteria can easily breed. Therefore, when purchasing plastic cups, you must choose food-grade plastic cups that meet the national standards.
2. Disposable paper cups or hidden potential carcinogens
There are three kinds of paper cups on the market now: the first one is made of white cardboard, which can't hold water and oil. The second is a waxed paper cup. As long as the water temperature exceeds 40℃, the wax will melt and release carcinogenic polycyclic aromatic hydrocarbons. The third kind is a paper-plastic cup. If the selected materials are not good or the processing technology is not enough, polyethylene will crack and change during hot melting or smearing on paper cups, resulting in carcinogens.
3. Multicolored water cups are easy to be poisoned by heavy metals.
Colorful cups are attractive, but you'd better not use them. Because those bright pigments have great hidden dangers, especially when the inner wall is glazed, when the cup is filled with boiled water or drinks with high acidity and alkalinity, toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid, and people will do harm to the human body if they drink the liquid containing chemicals.
4, stainless steel cups will dissolve when drinking coffee.
The advantages of stainless steel cups are durability, rust prevention and corrosion prevention. However, stainless steel cups are alloy products, which contain many heavy metals, such as nickel, chromium and manganese. If used improperly, these heavy metals will be released easily, which is harmful to health. Therefore, in daily use, be careful not to use stainless steel cups to hold acidic drinks, such as juice, coffee, carbonated drinks, etc. Do not store soy sauce, vinegar, vegetable soup, tea, etc. For a long time, the electrolyte in these foods may react with the heavy metals in stainless steel, leading to the precipitation of heavy metals.
Refer to the above content: People's Network-Choose the right cup for drinking water in midsummer, ceramic cups are relatively safe, People's Network-What cup is the best for drinking water? These four cups are not suitable for drinking water.