[Mr B]

I have almost (90%) of my stock in Tupperdors. Lock N Lock style to be exact. I have the bottoms of all of them lined w/ 1/4" Spanish Cedar. I leave a cup with Distilled water in the container with the cedar for a couple of days so that the wood will soak up what it needs. Then I fill the container w/ smokes. I usually never have to have any sort of humidification in with them. As Adam mentioned, if air-tight they will not dry out. Keep a Hygrometer in there to monitor. If it gets low I put in a humidification device for a day or 2, then take it out again. Plus, most cigars come from the dealers overhumidified, so adding them to your tupperware containers tends to keep things pretty level.
Good Luck.