Yes, I realize I declared this challenge and am entering it myself. ( http://www.makerbot.com/blog/2011/10/11/openscad-challenge-klein-bottle/ ) I didn't start designing this until well after I had already posted it. Since there are no real prizes, I figure you'll forgive me claiming the "first to upload", "fewest number of facets" and "most resembles either Kelsorj’s Klein Bottle ( http://www.thingiverse.com/thing:5217 ) or RotoScan’s Klein Bottle ( http://www.thingiverse.com/thing:11976 )"

The bottle could be rendered with even fewer facets by just reducing the number of faces on the cylinders in the OpenSCAD file.

Also, I hereby claim 9000 internet points! Mu-ah-ha-ha!

Also, a shout-out to CloudSCAD is in order for letting me draft this up from my browser.

1. Slice and print
2. Fill
3. Enjoy a tasty beverage by drinking it from the outside of your bottle