D.I.Y Homemade Waterfall bong (filtered)this is the best investment i have ever made, ever since i made one of these this is the only way i smoke now, gets you the highest using the same amount if not less.This is a homemade filtered gravity bong.(i always feel like gravity bongs get you the highest)just like one of these http://mall.virtual-shops.net/images/T/full-shoot-m.jpg Items you will need:- patron bottle- downstem- bowl- power drill- diamond head drill bit (20$ at lowes)All of itemsOk so we will begin with the patron bottle, clean it out.also we will need our diamond head drill bit from lowes.insert the drill bit into your power screw driver.next you will drill two holes out of the bottom of the patron bottle, make sure to do this under some type of running water while drilling. (it doesnt take very long at all actually, maybe like 5 mins for each hole.this is what it should look somewhat like.now you need your bowl and down stem. (this is the great part, its a filtered hit. )insert your bowl into the down stemthan insert your downstem into your patron bottle.than wallah you are finished, insert your patron bottle into a body of water and enjoy.once the patron bottle is full water, lift it and light what is in the bowl. than gravity will pull the water out of bottle and pulling your smoke in. once all the water is out remove your downstem and take that full hit.