Twisted Ribbed Pen Cup — one part, no supports

# Twisted Ribbed Pen Cup A rounded-square desk cup whose entire surface is fine ribs turning through 90 degrees from the base to the rim. It catches light the way a fluted glass does: the highlight runs diagonally across the ribs and moves as you walk past it. **50 x 50 x 70 mm** (63 mm across the twisted corners) · **about 40 g** · one part · no supports · no glue · no hardware. ## The wall is the same thickness everywhere The inside is not a plain cylinder with a decorated outside. The cavity…

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