1, stainless steel cup. Stainless steel cups are alloy products. Under normal use, the amount of chromium precipitation in stainless steel tableware that meets the national standards is very small, so there is no need to worry about its impact on human health. Improper use of inferior stainless steel products will release heavy metal substances, which is harmful to health.

2. glass. Among all the cups made of materials, the glass is the healthiest. Glass contains no organic chemicals in the firing process. When people drink water or other drinks from glasses, they don't have to worry about chemicals being drunk into their stomachs. Moreover, the glass surface is smooth and easy to clean, and bacteria and dirt are not easy to breed on the glass wall, so it is the healthiest and safest for people to drink water from the glass.