You're not storing them in the cure jars, they're in there for 2-4 weeks and being opened regularly. Anything is fine as long as you're burping them. Of course they have to be cleaned well and ideally not have had anything that would transfer the smell to the buds. I use old 2lb tin coffee cans for curing/burping as they can hold ~3 zips per tin with some air space left. Then transfer them to either glass jars. On the other hand I have stored in plastic with no issues, I've found 1 1/2 year old sealed plastic container when i moved that I forgot about and the weed was still fresh and no smell of plastic.