It depends on where you get it from, but in general it seems like it's the same stuff. https://www.consumerreports.org/toxic-chemicals-substances/potentially-h

It depends on where you get it from, but in general it seems like it's the same stuff. https://www.consumerreports.org/toxic-chemicals-substances/potentially-hazardous-pfas-found-in-fast-food-packaging-report-finds/ https://www.consumerreports.org/toxic-chemicals-substances/p... Cups are typically coated with polyethylene to make them waterproof, but I think I read somewhere that they are then coated with PTFE to make them slide apart easier when stacked.