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 ac

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".