For clarification as it went out of screenshot:
"No 7 = All other plastics not included in the other categories and mixes of plastics 1 through 6 are labeled with a 7, including compact discs, computer cases, BPA-containing products, and some baby bottles.
PLA (polymer polylactide) is a plastic made from plants (usually corn or sugarcane) that is also labeled with a 7. PLA plastics don’t contain BPA; no safety concerns have been raised about using PLA plastic with food. Right now, it can be difficult to tell the difference between a PLA no. 7 plastic and a BPA-containing no. 7 plastic. Some PLA plastics may also say “PLA” near the recycling symbol. Others may have a leaf symbol near the recycling symbol.
To clear up any confusion, the manufacturers of PLA plastic are working with the American Society for Testing and Materials International, a global group that develops standards, to create a new recycling numbering system that would give PLA plastic its own number.
Do not cook food in no. 7 plastics that aren’t PLA and avoid using non-PLA no. 7 plastics around any type of food. "