Thanks for the responses!

Tobias, the only difference is that Dan & Esoterica are using foil bags, and that may aid in sealing off the transfer of air - where I could see it being a bigger issue with plastic.

Jim, I do the same with smaller baggies (stuffed into bigger ones), but that's for tobacco I plan on consuming in the near future. My worry is that long-term, years, would be too much.

This came up because someone questioned me about my tobacco storage at home, and I mentioned that my cooler filled with Mason Jars is at capacity and a serious waste of space, given that they're cumbersome to store and not all filled to capacity. My customer's lightbulb went off and he said "transfer everything to vacuum-sealed food storage bags and open up half your storage space for more tobacco!"

I love the enthusiasm, and making room for 20 pounds of tobacco without actually buying a new storage container sounds great, but I'm not convinced it's a viable solution for tobacco going down for a 10 year nap.