Chindogu ...

... Not all useless things are design failures. In fact, chindogu is an entire line of Japanese inventions with the sole purpose of having no purpose. To be chindogu - which means "weird tool" - a product cannot be patented, must be anarchic in spirit, must exist, and, strangely enough, must not be for sale.

From http://www.groonk.net/blog/mt-archives/003193.php

This shiznit is even cleverer than first impressions would indicate.