Mobius Strip

The mobius strip is a wonderful geometric conundrum. It perplexes you since it is a closed 3-D object with only one edge (lo and behold!). It is really easy to make one of these, take a piece of paper and twist it clockwise on one edge, counter clockwise on the other edge join the two edges and you have this quizzical geometry.

This image describes it correctly:

Why am I putting this here? Well, I have this annoying habit of setting wires and straps on bags straight. I recently ran into this mobius strip on a bag, seeing that I could not make it straight made me wince. I could not come up with a name to attach and put my frustration on. Now I can. :)