1. Production license mark
Then you should look carefully to see if the plastic water cup is marked with a production license, that is, the OS logo. If not, it is best not to buy it.
2. The smell of plastic water cups
Smell the smell of the plastic water cup. If there is a pungent smell, it means that the water cup is of inferior quality and it is best not to buy it.
3. Material of plastic water cup
Secondly, the material of the plastic water cup should also be observed. Generally speaking, the plastic water cup made of resin material has high temperature resistance, and this kind of water cup is better.
4. Food grade
When buying a plastic water cup, you must find out whether the water cup is food-grade. If it is not a food-grade plastic water cup, it is best not to buy it, so as not to endanger your health.