When purchasing drinking cups

Update:21 Nov 2017

First look at the packaging appearance. Check whether t […]

First look at the packaging appearance. Check whether there is "QS" mark on the product or packaging to see whether the wall of the bottle is transparent and pure, generally poor quality plastic products are not clean and sticky astringent; try not to choose a more vivid color glass, add color may be to cover up the regeneration Harmful impurities in plastics or industrial grade materials;
Second is the smell, if there is a pungent smell, even if you do not unscrew the lid, smell from the outside, but also smell the smell;
Then look at the hardness, good plastic container thicker, hardness, hand pressure inward will not over-deformation; In addition, you can pour into the bottle of hot water to see whether the bottle deformation, odor, and repeatedly up and down Turn it upside down to see if it is sealed.
When using plastic drinking cup:
Plastic water cup for the first time before the use of hot water soak several times to remove the bottle may have impurities or harmful substances; when the ambient temperature is low, should be added a small amount of hot water preheating to prevent the glass in the dramatic temperature changes Resulting in structural changes, poor mechanical properties; low temperature will make the plastic easy to brittle, it is not appropriate to make the cup fall from a low temperature, try to avoid the glass on the extreme environment (such as high temperature or microwave heating).