Klein bottle, 1995.
© Science Museum / Science & Society Picture Library
A single surface glas vesel made by Alan Bennett in Bedford, United Kingdom. It consists of three columns of three Klein bottles interconnected, which when cut form three pairs of single-twist Mobuis strips, one of each pair being seperate, the other of each pair being interconnected. A Klein bottle is a surface which has no edges, no outside or inside and cannot be properly constructed in three dimensions.