The cup with stainless steel is very good and will not affect the health of the body. But to ensure that the use of stainless steel cup is a high quality cup. Poor quality stainless steel cups will rust, easy to have bacteria. It is advisable to drink a glass cup with a glass, because the glass will not have magazines dissolved in water, and in all the cups of the material, the glass is the most healthy. The glass does not contain organic chemicals during the firing process. When you drink water or other drinks with glass, you do not have to worry about chemical substances being drunk into the stomach, and the glass surface is smooth, easy to clean, bacteria and dirt Not easy in the cup wall breeding, so drink water with a glass is the most healthy and safest.