shop › Facet flat white cup 12 Image 1 of 2 Image 2 of 2 Facet flat white cup 12 $50.00 Wild clay and stoneware blend, shino glaze, woodfired to 1,300 degrees in the catenary arch kiln for 30 hours. Add To Cart Added! Wild clay and stoneware blend, shino glaze, woodfired to 1,300 degrees in the catenary arch kiln for 30 hours.