What does the mark on the bottom of the plastic cup mean?

"7"-As (acrylonitrile-styrene resin), PC materials and others.

Used in pots, cups, milk bottles, etc. High safety, fall resistance, but not high temperature resistance. Drinking cold water is harmless, but if you drink hot water, it will produce harmful substances after heating. Therefore, everyone must pay more attention when using it as a plastic cup.

The meaning of the digital label on the bottom of the cup:

"1"-pet (polyethylene terephthalate)

More common in mineral water bottles and beverage bottles. This material is heat-resistant to 70℃, can be filled with normal temperature water in a short time, and should not be mixed with acid-base drinks or high-temperature liquids, nor should it be exposed to the sun, otherwise it will produce toxic substances harmful to human body.

"5" PP (polypropylene)

PP plastic water cup is made of polypropylene, which has good thermal stability and thermal insulation, and is safe and harmless to human body. The product can be sterilized at the temperature above 100℃, and will not deform at 150℃ without external force, and there is no pressure when filling with boiling water.

"58 inch" PC (polycarbonate)

Commonly used in kettles, space cups, baby bottles, department stores often use water cups made of this material as gifts. But cups made of this material are generally not resistant to high temperature. If heated or in an acidic or alkaline environment, it is easy to release the toxic substance bisphenol A(BPA), so do not use it for hot water, and it is best to clean it with warm water.

6-polystyrene

Plastic cups made of ps are particularly brittle and resistant to low temperature, and cannot be used in high temperature, strong acid and strong alkali environments.

Extended information polypropylene is a relatively safe material, and the bottom of the cup is marked with the number 5. Children's plastic drinking cups made of materials other than PP are not recommended to be heated and disinfected by microwave oven to avoid releasing substances harmful to human body.

Plastic cups are filled with hot water, and toxic chemicals are easily diluted into water. There are many pores in the internal microstructure of plastic, which contain dirt. Improper cleaning is easy to breed bacteria. Therefore, when purchasing plastic cups, you must choose food-grade plastic cups that meet the national standards.

Glass should be the first choice when drinking water. Among all the cups made of materials, the glass is the healthiest. Glass contains no organic chemicals. When people drink water or other drinks from a glass, they don't have to worry about chemicals being drunk into their stomachs, and the glass surface is smooth and easy to clean, so it is the healthiest and safest for people to drink water from a glass.

People's Network-Health secret of plastic water cups Glass water cups are the first choice.