What is the number in the bottom triangle of the plastic cup? This is the sign of environmental protection for plastics

The numbers 1-7 represent common plastic varieties and their meanings are as follows:

1: PET (polyethylene terephthalate), a container made of this material, is a common plastic bottle containing soda, also commonly known as "professional bottle."

2: HDPE (High Density Polyethylene), cleaners, shampoos, shower gels, cooking oils, pesticides, etc. are mostly made of HDPE. Most of the containers are opaque and feel like wax.

3: PVC (polyvinyl chloride), used to manufacture water pipes, raincoats, school bags, building materials, plastic film, plastic boxes and other artifacts.

4: LDPE (Low Density Polyethylene), plastic bags that are everywhere are made of LDPE.

5: PP (polypropylene), used to make food containers such as buckets, trash cans, baskets, baskets, and microwave ovens.

6: PS (polystyrene), due to low water absorption, used to make building materials, toys, stationery, rollers, as well as cup holders or disposable tableware for instant drinks.

7: Others.

PC is an abbreviation for Polycarbonate. Since polycarbonate does not belong to the material range of 1-6 above, the number in the middle of the triangle marked with the circulation mark is 7, and in order to facilitate the sorting at the time of circulation, the material name PC is indicated next to the circulation mark.