Good info, tnx, y'all.

I've been using the plastic containers that Chinese take-out soup comes in (with a piece of tape over the little hole they poke in the top), for some of my tobaccos. Perhaps I should scrounge up / invest in some more jars and ditch the plastic.

Granted, I just keep short-term tobacco for semi-immediate use, but over time, short-term tends to become long-term