What does the number on a plastic container indicate?

The number on a plastic container, typically found within the recycling symbol, indicates the type of plastic resin used to make the container. This code, ranging from 1 to 7, helps identify the material's properties and recyclability. For example, PETE (1) is commonly recycled, while PVC (3) is less frequently accepted in recycling programs. Understanding these numbers aids consumers in making environmentally responsible choices regarding disposal and recycling.