I have a tuppador made from a "Ziplock" plastic container. It has service me very well. It will hold about 100 cigars. With the weather change I'd been having some trouble keeping the humidor under 70% humidity. I was opening it occasionally, leaving the top cracked open to bring down the humidity.
I decided to try a little experiment.
I took a cigar tube - toro - sized. I drilled three holes in the cap and three holes around the top edge of the tube. I put one inch of unscented kitty litter in the bottom of the tube. I closed the tube and placed it in my tuppador. The kitty litter is absorbing some of the water in the air and has reduced the humidity in the tuppador.
I'm not sure how long this will be needed or how long the kitty litter will remain absorbent, but I think it has helped. I'll have to keep a watch on the humidity to determine if this is still needed or if replacement of the litter is needed.
I use two humidifiers with a juice (50/50). This typically works great, but at higher humidity times, the kitty liter tube may be a good addition to help keep humidity down.
Sorry for the misspelling of Humidity in the title...I can't figure out how to change that...