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Twisted Vortex Bowl — one part, no supports

A catch-all bowl whose flutes spiral out of a small foot into a wide rim. The flutes climb at the same angle everywhere, so nothing on the outside of the bowl overhangs past 36 degrees and it prints with no supports and no brim. 46 mm foot, 78 mm rim, 45 mm tall, holds about 115 ml, around 30 g. Parametric OpenSCAD source included — twist, flare, flute pitch and depth are all named variables at the top.