haha the talk about homemade bongs really sums up high school for me. in fact, for several years I only hit gravity bongs at home, just the ratchet pushed through a melted 2-liter cap. i shudder to think about my lungs, lol. it is the way to go if you're really trying to stretch your flower, but man it's pretty rough. I also had this one setup that used a taller Smartwater plastic bottle, a French horn mouthpiece for the bowl about 2 inches up from the bottom, and some silicone around it trying to seal it I'd have to re-do like every week.
nowadays it's Firefly or nothing for me, I actually feel little urge to smoke unless it's one of my friends offering to. once you get that taste of what the herb is really like with convection vapor, it's hard to go back to actual combustion.