This basically echoes the reason I'm doing it now even while I have so long to go. Do you heat up just the Mason jars by themselves and then put the tobacco in and cap while hot? I've canned before so I understand the concept. But obviously it's quite different with thisBlends dissapearing, brands going under (Dunhill, mcClellands) tobacco crops suffering as all the tobacco is grown many for cigarettes now so not quality tobacco. Tobacco varieties disappearing (Syrian lat) WW3. I suggest go hard it's not getting any cheaper. I lucked out and took this advice about 8 years ago and probably have more than I'll smoke. And I'm 46. When jarring be careful, I went with the lazy way of stuffing tobacco in and screwing on the lid and a few ive opened have been dried out and aging never happened. Hot water bath then put the lid on and you'll have an airtight seal. The button should pop in. Avoid gasket jars except for what you're actively smoking they don't hold moisture in long term