1, glass It is safe to use glass in all materials. This is because the glass cup is made of inorganic salt at a high temperature of more than 600 degrees, so the chemical composition is stable, no harmful substances are produced during the firing process, and it is particularly smooth, and bacteria and dirt are not easy to breed.

2. Lock the plastic cup. Many people use plastic cups with locks, which are only suitable for occasional use and may be relatively easy to carry when going out. However, Lekou's equipment is actually very poor, because when you buy a cup, you have to look at the number at the bottom of the cup. The higher the number, the better the quality, but it is also relative, because high temperature will release toxic substances from PC-made water cups.

3. Ceramic cups. Most people use ceramic cups in the office, and many people have more than one. We know that ceramic embryos are also divided into three categories, one is colorless glaze on the inner wall and the other is colorless glaze on the outer wall. There is also a downloaded ceramic cup, and there is also a ceramic cup with the upper right color. When buying a ceramic cup, you can choose a ceramic cup with bright glaze and colorless inner wall, or you can choose a ceramic cup with lower color on the right, but never choose a passwith with higher color.

4. Enamel cups. The enamel cup is actually coated with a layer of enamel outside the metal, which takes into account the advantages of metal and porcelain. But this kind of cup has a serious disadvantage, such as the right side of the stomach will fall off after falling, and then the metal inside will be exposed, and then it will rust easily, which is harmful to people's health.

5, 2 stainless steel cups. Stainless steel cups are not only drinking cups, but also thermos cups, and now they have become essential items for healthy people to carry with them. However, because it is an alloy product, it may contain more heavy metal substances, which will release some harmful substances when it produces chemical reactions, such as carbonated drinks and fruit juice.

6. disposable cups. Disposable paper cups or plastic cups are actually a plastic film with polyethylene inside the paper. It doesn't matter to use it once in a while, as long as you don't drink hot water. It is not good to use paper cups or plastic cups for a long time.