What food item or items should we not store in a plastic peanut butter jar, for example?

I suppose this is for a chemist or chemistry buff. We’re not supposed to heat/cook food in containers that don’t indicate it. That is common knowledge, but how about storing peeled potatoes in them? Is it common knowledge that one shouldn’t store (in fridge or out) peeled potatoes in a peanut butter jar, for example?

What is supposed to happen if one does do that?
What other food items does it apply to and why?