the symbol on it? , indicating that it is a registered trademark. If it is the logo below, it indicates the recycling logo of plastic products. This set of signs will stamp the plastic material identification code on the container or package, from No.1 to No.7. Every plastic container has a small ID card-a triangular symbol, usually at the bottom of the plastic container. There are 1 ~ 7 numbers in the triangle, and each number represents a plastic container. They are made of different materials and have different taboos in use.