this is something a coworker told me about the other day... i was gonna mention it earlier, but i forgot... hmm... wonder why. lol... anywayz, it's an adaption of a gravity bong (bukket) that takes a bit of the harshness out of the hit by filtration. now... some of you may be thinking, how do you filter a bukket? well... here's how... take the standard bukket materials: plastic bottle, bucket, water, metal bowl. with the addition of one more. an extension for the bowl's stem. make sure it's almost as long as the bottle, but short enough so it's out of the water before the bottle is. with the the extension being submerged in the water, when you pull the bottle up to milk the bukket it will pull the smoke through the water first, almost like a hooka (hence the term bukka).