Read what each symbol means and about the plastic resin identified (PDFs).
These symbols on the bottom of plastic products are often misunderstood. They are codes that identify the type of plastic resin used to make the product. For one thing they do not identify anything such as "food grade".
They are simply a code used to aid in recycling. Whether the product is recycled, however, is a business decision on the part of the recycling company.
The SPI resin identification code has been developed to provide a