1, 2, 3, 4, 5... Under the plastic cup. What does it mean?

- Mar 03, 2018-

1 PET polybutylene terephthalate

      Common mineral water bottle, carbonated beverage bottle and so on. Heat resistance is easily deformed at 70 C and melts out substances that are harmful to the human body. After 10 months of use of plastic 1, the carcinogen DEHP may be released. Do not put in the sun in the car; don't put in wine, oil, etc.

2 HDPE high density polyethylene

      Common white medicine bottles, cleaning products, bath products. Don't use it as a water cup, or use it as a storage container for other items. Clean not thoroughly, do not recycle.


      Common raincoats, building materials, plastic films, plastic boxes and so on. Good plasticity, cheap price, so the use is very common, only heat-resistant 81 degrees. High temperature is easy to produce bad material, rarely used in food packaging. Difficult to clean and easy to remain, do not recycle. Don't buy a drink.

No. 4 PE polyethylene

      Common fresh-keeping film, plastic film and so on. At high temperature, the harmful substances are produced. When the toxic substances enter the body with food, it may cause diseases such as breast cancer and congenital defects of the newborn. Keep the fresh-keeping film from the microwave oven.

No. 5 PP polypropylene

      The common Soybean Milk bottles, yogurt bottles, juice beverage bottles, microwave reheatable. The melting point is up to 167 degrees centigrade. It is the only plastic box that can be put into the microwave oven and can be reused after careful cleaning. It should be noted that some microwave oven boxes are made of 5 PP, but the lid is made of No. 1 PE. Because PE can't withstand high temperature, it can't be put into the microwave oven with the box.

6 PS polystyrene

      Common bowl packing box, fast food box. It can't be put into a microwave oven so as not to release chemicals because of the high temperature. Acid (such as Liu Chengzhi), alkaline substance, will decompose the carcinogenic substance. Avoid packing hot food in a fast food box. Don't cook a bowl of instant noodles in a microwave oven.

No. 7 PC other classes

      Common water kettle, space cup, milk bottle. The department store often uses such a glass of water as a gift. It is easy to release toxic substances, bisphenol A, which is harmful to the human body. Do not heat in use, do not direct in the sun