waterfall bong. A 2L coke bottle witha cone or bowl what eva you wanna call it in the cap and put a hole about a few cms in the very bottom. pack your cone and fill the bottle 3/4 full ov water and as you let the water run out the bottom you have a lighter over the packed cone and as the water drains out it sucks the smoke into the bottle and when all the water is gone or all you weed has burnt open the cap and take hits ov it...