We are packing the models that we are taking to SIGGRAPH today and I wanted to show you a really cool one. It is Bathsheba's Klein Bottle. This is a mind blowing model and it is a really distracting object to have about the office. You see people pick it up, scratch their head and try to wrap their minds around it all the time. I don't know if you can see it properly from the photographs but a Klein Bottle is a "non-orientable surface". It does not have a distinct 'inside' and outside. You can read more about it here or check it out on Shapeways here.