This Escher-looking structure is the Klein Bottle. It exists only in four dimensions, has only one surface, and contains itself. See what happens when the Möbius Strip turns to drink. Many people have ...

Can you ever fully fill a Klein bottle? A mind-bending look at the Klein bottle and why it breaks the rules of ordinary containers. It explains what the shape is, how real models are approximated, and ...

A Standard Klein Bottle, a Spiral Klein bottle, a Wine Bottle Klein Bottle, or a Klein Stein — which would you choose? A Standard Klein Bottle, a Spiral Klein bottle, a Wine Bottle Klein Bottle, or a ...