A Klein bottle and its label
The animation shows what happens by moving a label across a Klein bottle; here the label is seen upside down, but it gets in the right position after one turn.
© matematita
animazione di Gian Marco Todesco
The image belongs to the sections...:
The Klein bottle (Topology)
Topology (Animations)
Further information:
http://www.toonz.com/personal/todesco