Get the best of 3D Printing in your inbox, plus exclusive offers and recommendations from the Shapeways team.
This is made by gluing two copies of the Round Möbius Strip along their boundaries. A Klein bottle in 3-dimensional space has to intersect itself, and in this case it intersects itself along a straight line.
Note: this is an updated version of the model from the one shown in the YouTube video.
This was designed with Saul Schleimer.