
There are certain products upon which people will lavish design attention, but will probably never apply for design patents on: Bongs.
Up above is a selection of Roor bongs. Roors--which are more "performance-based" in their design, according to this analysis--is what Michael Phelps was reportedly taking hits off of, and you can see an astonishingly large variety of them here. Unsurprisingly, most of the photos are rather hazy.
Comments
I once made a virtual reality bong in high school (pun intended)
out of a Lazer Tag gun, some blinking bicycle lights and a gas mask. Someone stole it at a party.
You can get a patent on a bong:
http://www.google.com/patents?id=jRY0AAAAEBAJ&dq=water+pipe