I have a gravity bong that works great. I made the bowl with a frosting tip that was metal. It is such a good bowl. I sealed it with wood glue and has worked for well over a year. I also made my first waterfall this weekend with a Jack Daniels bottle that I finished off the previous night. my friend and me have been using the shit outta that drill bit. Jack hits so good. Plus now I can have interesting reactions from people when i say "Smoke Jack Daniels"
okay i'd like to make a little report on that lovely WATERFALL BONG. as opposed to the grav bong, you poke a little hole in the bottom of a 2L, fill it with water, light the bowl while making the water run out, and you're DONE. i definetly would say this one got me higher faster than the gravity bong, and i didn't have to worry about pressure and whatnot. very fun. we went to meal hall and ate a ridiculous amount of fries and wonderful nachos... good times yay uni
Man all the different names trip me out. In Australia the "waterfall" bong is called a rocket. I only use it if there isent a bucket of water handy.