[jaapz]

We're currently going through plastics being banned for snack foods where I live, and even vendors that were using "cardboard" boxes are hit because they are actually cardboard boxes lined with plastic (because cardboard + oil don't work together very well).

Wax gets soft when heated, so I'd be really surprised if the cardboard you're talking about is actually using "wax".

[tohnjitor]

Also many so-called paper or cardboard products are partially or entirely made from plastics and not wood pulp.