shop › Speckle flat white cup 1 Image 1 of 3 Image 2 of 3 Image 3 of 3 Speckle flat white cup 1 $50.00 Stoneware and wild clay blend with soft eggshell glaze. Woodfired to 1,280 degrees in the catenary arch kiln for 30 hours. Add To Cart Added! Stoneware and wild clay blend with soft eggshell glaze. Woodfired to 1,280 degrees in the catenary arch kiln for 30 hours.