Ceramic cup: choose underglaze color as well
The colorful ceramic water cups are very flattering. But in fact, there are huge hidden dangers in those bright paints. An inexpensive colored ceramic mug is usually coated with a glaze on the inside. When the glazed cup is filled with boiling water or drinks with high acidity and alkalinity. Some aluminum and other heavy metal toxic elements in the glaze are easily precipitated and dissolved into the liquid. At this time, people drink liquid with chemical substances, and the human body will be harmed.
The use of ceramic cups is best to use natural color cups. If you can’t resist the temptation of color, reach out and touch the surface of color. If the surface is smooth, it means that it is underglaze or underglaze, which is relatively safe. If it is uneven, and it will fall off with nails, it means that it is on-glaze color, and it is best not to buy it.
Paper cups: Disposable paper cups should be used sparingly
At present, almost every household and unit will prepare disposable toilet paper cups. Once used by one person, throw away after use, which is hygienic and convenient. But such a common cup hides many problems.
There are three types of paper cups on the market:
1. Made of white cardboard, can not hold water and oil.
2. Waxed paper cups. As long as the temperature of the water exceeds 40°C, the wax will melt and release the carcinogenic polycyclic aromatic hydrocarbons.
3. For paper-plastic cups, if the selected materials are not good or the processing technology is not good enough. During the process of polyethylene hot melting or smearing to paper cups, cracking changes will occur, resulting in carcinogens.
