Not true for everything but the vast majority are.
Even plastic-backed paper (ie, not PFAS) is much better than a fully plastic container, so I support his.
Consumer Reports did some testing on this, writeup here: https://www.consumerreports.org/health/food-contaminants/dan...
It's from a couple years ago now, so individual results might be out of date.
Even plastic-backed paper (ie, not PFAS) is much better than a fully plastic container, so I support his.