Best way to track material substitution trends in packaging?

A few solid approaches: Mintel and Euromonitor both track packaging material shifts and publish category-level reports on plastic alternatives. I'd also recommend scraping new product launches on Mintel GNPD and filtering by packaging claims — it gives you real-time brand behavior, not just surveys. LinkedIn job postings for 'sustainable packaging' roles can also signal where brands are investing internally, which is a sneaky leading indicator.