A non-orientable minimal surface that can stand proudly beside any Mobius strip, Klein bottle, or gyroid! This one joins the vertices of an icosahedron with linked half-twists. The result is a pleasing array of pentagonal and hexagonal faces.
Just how many half-twists are there? Nobody knows! OK, fine, it's 90.
Enjoy it as a desk toy or as part of a collection on your bookshelf. Or it could make a great Christmas or holiday ornament. Or it could be decoration or a gift at a party for people who appreciate math and physics sculpture.