Answer: Glass, enamel cup, ceramic cup, plastic cup, stainless steel cup, iron cup, aluminum cup, wooden cup, paper cup ... When we go to the mall to buy water cups, all kinds of cups will come into our eyes, especially those with bright colors and unique shapes, which make people like them. I tell you, the first choice for drinking water should be glass. Don't think that glass is just transparent and beautiful. Among all the cups made of materials, the glass is the healthiest. Professor Li Fuxing, Chairman of the Health Water Professional Committee of Chinese Medical Association, listed the characteristics of glass water cups: the cups do not contain organic chemicals in the firing process, so when people drink water or other drinks from the cups, they don't have to worry about chemicals being drunk into their stomachs, and the surface of the cups is smooth and easy to clean, and bacteria and dirt are not easy to breed on the glass walls, so it is the healthiest and safest for people to drink water from the cups. In addition, experts also advocate the use of enamel cups, because enamel cups are made of thousands of degrees of high-temperature enamel and do not contain harmful substances such as lead, so they can be used with confidence. While cups made of other materials, such as brightly colored ceramic cups, are attractive, in fact, those bright pigments have great hidden dangers, especially when the inner wall is glazed. When the cup is filled with boiling water, toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid, and people drinking the liquid containing chemical substances will do harm to the human body. Plasticizers are often added to plastics because they contain some toxic chemicals. When hot water or boiled water is filled in plastic cups, toxic chemicals are easily diluted into water. There are many pores in the internal microstructure of plastic, which contain dirt. If it is not properly cleaned, it is easy to breed bacteria. Therefore, when purchasing plastic cups, you must choose food-grade plastic cups that meet the national standards.
In addition, there is a kind of water cup called magnetized cup. When it first appeared in front of everyone, it was mainly to publicize that magnetized water is beneficial to human health, but not all magnetized water will be beneficial to human health. Only the magnetized water of the negative electrode can improve the physiological function of the human body and play a health care role, while the water treated by the positive electrode should not be drunk. Most of the magnetized cups we see in the market use ordinary magnets, regardless of the positive and negative poles. Therefore, consumers should carefully identify when choosing a magnetized cup, and choose a unipolar magnetic sheet (negative electrode) as the magnetized cup.