The glass is not poisonous.

The glass does not contain organic chemicals in the firing process. When people drink water or other drinks from the glass, 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. Therefore, it is the healthiest and safest for people to drink water from the glass. ?

glass selection instructions?

1. Logo trademark: whether it is a well-known manufacturer, or whether the company has a special trademark, and whether it supports bar code (one of the criteria for entering the mall). ?

2. The external appearance should be smooth, transparent and beautiful, without cracks, scratches and dirt; The cup body should be smooth, and there should be no burrs that damage the skin; There must be no bubbles or stains in the cup; The mimeographed patterns and handwriting on the cup body should be clear and beautiful. ?

3. The standard capacity is 3ml, and other capacities are 26ml and 36ml, with a tolerance of 5%. ?

4. sealing performance means whether it is leak-proof: after the lid is tightened, shake the drinking cup greatly, the cup is in any state, and there is no leakage of liquid in the cup.

what are the above references? Baidu encyclopedia-glass