It is not harmful to the body, because stainless steel is a relatively stable synthetic metal, resistant to acid and alkali corrosion, and there will be no free metal ions.
If you want to be more beneficial to the body, you should choose a wooden fish stone cup, there are many beneficial trace elements that can be absorbed by the body.
The drinking glass should be glass. Of all the cups, glass is the healthiest. The glass does not contain organic chemicals during the firing process. When people drink water or other drinks in the glass, they do not need to worry about the chemicals being in the stomach. The glass surface is smooth and easy to clean. Dirt is not easy to grow on the wall of the cup, so drinking water from a glass is the healthiest and safest.
