From then on, it has been a "fog machine" as far as TSA was concerned... ;-)
Admittedly, and sadly, I haven't tried to fly with it within the last two years [and, at that time, I didn't worry about it a bit nor did I clean it obsessively, etc. - these days, though, I'm hesitant to even attempt flying with it]... =\
[1] = http://www.storz-bickel.com/vaporizer/volcano-vaporisation-s...