What do the numbers in the recycling symbol on plastic containers indicate?

The numbers in the recycling symbol on plastic containers indicate the resin type, which refers to the specific type of plastic material used to make the container. This numbering system, often referred to as the recycling code, helps consumers and recyclers identify the type of plastic, which is essential for determining how it can be recycled or reused.

Understanding the resin type is crucial because different types of plastics have varying properties, recycling processes, and environmental impacts. For instance, some plastics can be easily recycled and repurposed, while others may be more challenging to process. The numbers range from 1 to 7 and represent different categories of plastic, such as polyethylene terephthalate (PET), high-density polyethylene (HDPE), and polystyrene, among others.

This information is valuable not only for recycling but also for informing consumers about the safety and suitability of plastics for certain applications, such as food storage. By recognizing the type of resin, individuals can make more informed choices regarding the use of plastic products and their disposal or recycling options.