A faceted, low-poly pen cup whose body is a closed triangulated polyhedron. Per-vertex radial jitter and a gentle spiral twist break the surface into alternating triangles for a cut-crystal look, while a perfectly nested inner shell keeps the wall thickness uniform and opens the mouth as a crystalline rim. Sliders control the facet count and ring resolution, facet depth and twist, and the body's foot taper and mid-height bulge.