Some of the dried tobacco may not come back if it has been a long time. It may have lost a significant portion of the essential oils, which once lost cannot be recovered, but the re-hydration commander mentioned is effective restoring the moisture content.
One note about jars is to make sure they are clean and dry before use, I don't sterilize but I do clean and sanitize in the dishwasher and give them ample time to dry. Also don't recycle jars that contained items with a strong flavor or aroma, such as pickles or pasta sauce.
Bearing the burden of responsibility..... It's probably my fault.
Treat your silver as if it were earthenware and your earthenware as if it were silver - Seneca, Letters of a Stoic