Storage totes like that don't have an airtight seal. The seal is actually pretty loose. I have those in my basement. Wait until late season, you can get a large cooler on clearance if you keep your eyes open. I picked mine up for $7 at wal-mart in the hunting section. They also have digital thermometer/hygrometers for about $6. As long as you keep cedar cigar boxes in the cooler, you don't need to line the walls.