Geek Crafts: Knit Klein bottle hat

A Klein bottle is basically a three-dimensional Moebius strip. It is a bottle with only one side. A bottle that contains itself. Crazy? Yes. And now you can knit one and wear it as a hat! This clever knitting designer realized that if you poke in the bottom of a Klein bottle, it can be worn on your head. Get the free pattern here on Knitty.com.

Image courtesy Flickr/How I See Life