SPI is the trade association for the plastics industry, based in Baltimore. The organisation serves processors, equipment manufacturers, material suppliers, and recycling companies across the full supply chain. It provides advocacy on issues including environmental concerns, food and drug packaging regulations, worker safety, and recycling, alongside business resources such as industry data, equipment statistics, and sustainability programmes. SPI would be a useful referral for any business involved in plastics manufacturing, processing, equipment supply, or recycling that needs industry representation or professional networking.