Swarthmore’s recycling handler, Republic Services, requests that lids be kept on plastic food and liquid containers; caps cannot be recycled separately. Alternatively, caps can be donated to schools for reuse in art projects.
Here is information from the Association for Plastic Recyclers website:
--https://www.plasticsrecycling.org/education/faqs/caps-on
--https://recyclingsimplified.com/
--https://www.swarthmorepa.org/DocumentCenter/View/837/Recyclables-Collateral-2