Klein bottle

thingiverse

This is a 3-dimensional representation of the Klein bottle, a non-orientable surface with no boundary. Like the Möbius strip, this object has only one side, so you can travel from any point to its opposite without crossing a boundary. UPDATE: The file "Klein_bottle_without_barriers_Thingiverse.stl" does not have a wall through the tube, allowing it to be filled with a fluid such as water or air. Print Settings Printer: CTC Bizer Rafts: Doesn't Matter Supports: No Resolution: 0.25 mm Infill: 100 % Notes: When printing with transparent materials, avoid using supports since they will be visible and difficult to remove. Since this model is only a surface and not a solid object, it's best to print at 100 % infill to completely fill the wall. How I Designed This I built this model using Blender, but because you can't determine the normal vector on the surface, I had to make a cut for a consistent normal vector. I've added the Blender file for your reference, where you can adjust the resolution or wall thickness as needed.