This a thing I had never seen modeled in Blender before. If you don't know what a Klein bottle is, check it out here:
http://en.wikipedia.org/wiki/Klein_bottle
Made using the latest Dingto's cycles build ( 4779 for Win 32) from Graphicall.org.
I hope you like it .
Luksdm.blogspot.com
This bottle was modelled before: http://www.luxrender.net/forum/gallery2.php?g2_itemId=12282 Thanks anyway for sharing :)
Man. These things always make my head hurt.
You know that would make this even cooler? A fluid simulation inside the Klein bottle. Then it'd just fry your computer. :)