Yeah, I've got a combo of heartfelt beads and kitty litter in my desktop humidor, which has glass, but it keeps RH very well. My second one, I just got and haven't set it up but, but it also has a glass door. I'm planning to use kitty litter and may end up buying HF beads for it too. Mainly, I was just curious what people use for their travel humidors. It came with that green foam, but I hate that crap. I opened it up and pulled it out and put KL in there, but it was too fine for the openings and it all came out. I have thought about buying a finer mesh and cutting it to size to put KL in there again. I like the Boveda pack idea, but I was reading on their website and it said they don't have to activated and are once use, not rechargable. That's why I asked if anyone has recharged them, didn't know if it could be done anyway. I don't use my travel but a few times a year and hate the idea of buying a new Boveda every time I want to use it. If it's just a day or two I don't really worry about it, as it seems to keep a good enough seal that it isn't needed, but longer term I want something.