I keep my tobacco in a large plastic bag, I buy it 5# at a time.
That lasts me 3 Months and doesn't dry out.
I have to fill my pouch every day so I've never noticed anything drying out.
I use a leather pouch w/ a vinyl lining made by Rea in Holt Florida, those pouches are
gorgeous and the vinyl lining doesn't start deteriorating after a few years like the rubber linings do.
I've had to trash several $100 pouches that had the lining turn gooey.
Little bits of the rubber would get in with the tobacco and spoil a bowl of tobacco.
Time will tell how well the vinyl linings hold up.
Sometimes I can get her to make me a pouch with a lambskin lining, I've become addicted to her pouches.
I've bought 3 dozen of them and sold the extras on eBay.
Us retired guys need a hobby, so pipes, pouches and reamers is mine.
I don't make much, but I'm getting to play with all the things I love.