I only today found out about parachutes or lungs... it's basically a gravity bong but you tape a plastic bag to the bottom, and you pull that to create suction while lighting it. Naturally I had to try it out as soon as I found out about it. Instead of a bottle I used a large sugar container, and I stuck the mouthpiece of my chillum into the hole I made at the bottom and my bowl onto my chillum. I'll attach a picture of it if I can figure out how to lol.Thing hits pretty hard, but I think I might slightly prefer waterfall bongs. You guys know of anything else like this that may not be common knowledge?
Until that day comes, I'll just heat up some glass and touch it to my bowl when I'm in a vape-y mood. By no means precise, but it does the trick. Going to buy a steamroller first though... my favorite type of piece.