willieR said:[/snip]
At this point given the size and shape, the iolite still seems to be in the front when it comes to "put it in your pocket" stealth. I'm very tempted to get a magic launch box, however. That company has a good vibe.
If stealth is your priority please get the mflb! It's quite awesome in that department, it doesn't however match the no2 when it comes to vape thickness (but then again fat clouds are hardly stealthy, so I keep telling myself it's a feature! )
As to the black stuff at the bottom of my tube... ELECTRICAL TAPE! With a pair of O rings at the end. My early solution to getting the no2 into a cheep bong. Now I've since gotten a GonG attachment, and a nice 2 footer to go with it.