Coolers are excellent inexpensive storage. I bought a 70 qt and thought I would have a hard time filliing it. Let's just say I was wrong.

I use about 1.5# of Heartfelt beads and have to recharge about every 3 months and rotate things around then. I open it for air exchange on average of twice a month, not that it's necessary, its usually to grab a cigar. I like Bovedas and use them in my humidor and tupperdor. But for something the size of a cooler, beads or kitty litter is a better option IMO.