For cardboard packaging and cans they use to use some (more expensive) edible plant based wax. I see a video one time from someone with some healthy canned food

For cardboard packaging and cans they use to use some (more expensive) edible plant based wax. I see a video one time from someone with some healthy canned food business trying to return to it. Lack of demand drove up the prices even further. I suppose food is just to cheap?