Newbie is correct. Just a few minutes searching the net the overwhelming consensus is oxygen is required. Of course he did so it his overly aggressive "special tone" but he's correct. From PipesandCigars...
If you are aging bulk tobacco, or are looking to age tobacco from vacuum-sealed tins, the preferred method is to use mason jars (like the ones used for jarring preserves and pickles), but the method is different than you would use for food products. Fill the jars about ¾ of the way, leaving enough air space to allow for maturation. Whereas you would usually put these jars in a bath of boiling water for food preservation, that extreme heat would change the tobacco, so draw hot tap water (temperature below 140° F) into your sink, and place the jars in the sink so that the water is about as high as the level of tobacco in the jar. Let them sit in the water for about 15 minutes, and screw the lids in place. Remove them from the sink, and as they cool, a light vacuum will pull the lids tightly into place. Some folks like to use a vacuum sealer and bags to age tobacco, but this has the same problem as vacuum-sealed tins. Using ziplock bags or Tupperware type containers just won’t work as there will be too much air exchange, and the tobacco will dry out.