by cdsteinkuehler, published
A nonconvex polyhedron, topologically a toroid, with 14 triangular faces, the Csaszar polyhedron is the dual of the Szilassi polyhedron: http://www.thingiverse.com/thing:12200
The Csaszar polyhedron has no diagonals; every pair of vertices is connected by an edge.
Slice and print as usual. I had good results with normal 40% infill and hollow (3 shell) versions.
A trivial OpenSCAD file is included if you want to tweak anything.