I would jar everything that is sealed in plastic. I don't care if it is food-grade, thick and vacuum sealed. You don't want plastic to leech into your tobacco (or food). I'm not paranoid about plastic stuff, but I do think it is a worthwhile concern. I've lost spices and various other things to plastic leeching. If you've ever smelled it, you know what I'm saying. It doesn't take long, either. I just lost a spice that was maybe only 18 months old to a plastic container going through changes. Never trust plastic for longterm storage. I know there are plenty of people saying things like, "I've been using Tupperware for years. That's nonsense." I thought the very same thing, but in the last few years, I've lost more to plastic leeching than I ever have. I don't know why that is. I'm not claiming to know why that is. Different plastic recipes? Garbage coming from China with no quality control or oversight? You tell me. I only know that if I get something I plan to ingest or smoke, it doesn't sit in plastic for longer than a month or two.