Thought it might be time to post this again. Since its time to buy again and I lost the original email from Ultrapet.
I’ve had two 150 Quart Marine Cooler coolerdors in my basement for over two years. I have less problems with them than with my three other large humidors. You don’t need to line them just store your cigars in old wooden cigar boxes.
You can keep your beads in a cigar box you cut with vents covered with nylon screen, or just do like I do and either fill with beads an old, but clean, sock or the foot of some pantyhose and tie it off.
When your RH gets low toss a damp sock into the coolerdor until the RH gets back up around 70%. Don’t spray water directly on your beads or they may fracture leaving lots of dust around your cigars.
To start, or charge, your coolerdor, place empty cigar boxes, your beads and a clean damp rag (a couple of athletic socks works well too) into the coolerdor and close it up for a few days, or until the RH stabilizes between 65% and 70%. Then fill with cigars. Very simple and cheap. Place Coolerdor someplace where the temp stays fairly constant (between 50-70 degrees) and the humidity is constant too. I have a dehumidifier for my basement anyway, so I set it at 65%. It works well for me.
For those of you who have enjoyed the cheap Kitty Litter beads for humidifying your humidors and coolerdors, Exquisicat Pearl Fresh is no longer being produced, but the manufactor has told me that they are still producing the following brands that are the same as Exquisicat Pearl Fresh:
Tracksless Litter Pearls
Crystal Clear Litter Pearls
Ultra Pearls
http://www.ultrapet.com/ccmsds.html
From a manufacturer of ultra kitty litters: "We have been contacted by a number of folks about using our pearls to maintain humidity in cigar humidors and they find that any of our pearls are great for this process. We have Trackless Litter Pearls, Crystal Clear Litter Pearls and Ultra Pearls."
BTW, they changed the shape of the beads so they don’t bounce and roll away so easily.
I find that KL maintains RH at exactly the same levels as 65% cigar beads. JMHO