I bought a 50 ct desktop, then a 150 ct desktop, then a 300 ct, then another 300 count, then finally admitted I'm too deep to to turn back and bought a 150 qt cooler. With a couple pounds of hearfelt beads, the few boxes, a couple trays and a few spanish cedar planks as shelves, it stayed pretty consistent, even at only 35% capacity until I fubared the seal. A good seal on a 100 qt with a pound of beads and you should be fine. The heated idea is interesting but I'd be concerned about getting into the dreaded beetle range. The idea of some bugger eating my sticks is enough to give me nightmares