One thing I have noticed with the tupperdor, I used it for a road trip with my lady and my normal travel humi was too small, be very careful of swings in temp. That is the biggest enemy to constant humidity other than the moisture itself. Warm air holds more humidity than does cold, so if you pack everything in the tupperdor from a warmer environ than you're traveling in/to then you can expect condensation.
I noticed it with mine when we were in the truck. I like it chilly cold in there year round and the moisture in the tupper started to condense. We lifted the lid and let it breathe, and everything was all good, but keep an eye on it.
Also of note, I wasn't using a Boveda system, I was using a generic crystal based humidifier. I would like to repeat the trip with Boveda to see how much different it is.
Watch out for temp swings since tupperware is thin and non-insulated, and watch out for sun exposure if using it for travel.
For me it's a psychological aversion that keeps me from using KL. I just don't think they clean the beads/crystals well enough to get rid of particulate that may land on my sticks, after all, a cat is going to use it as a bathroom. How dust free does it need to be for that? Is it harmful? Probably not, but I don't want to entertain the notion of smoking kitty litter residue while enjoying my sticks.
Either way, good luck.