Here's a how-to article on making a gravity bong that I wrote a while ago. Thought it would be a good addition to the Toking Tools section here Here's the link: http://www.wikihow.com/Make-a-Gravity-Bong-in-10-Minutes Also, It has detailed step-by-step directions with high-res pictures for each step. Enjoy
WOW how does it take 10 mins to make one of these? get hose, stick thru melted coke lid to make seal. Use bluetack around outside to make seal better. Get lighter and make hole in bottom of coke bottle fill bottle wit water with ur finger over hole. Stick in packed cone peice in the tube, screw on lid, light. Took about 2 mins me to make on for the first time, if i had all stuff on desk i could probs do in 1 mintute, the main time waster is making seal for lid ...