No two of these watercolor mugs will ever be alike! Each mug is wheel thrown using a rich chocolate brown stoneware clay in B. Robertson's Shenandoah Valley pottery studio. DETAILS: This mug is hand layered in 4 food/drink safe glazes, and fired to over 2200°F. The glazes mix and blend in shades of light blue, dark blue, violet, purple and moss green to create a nebula effect. VOLUME: Approx 13-14 fl oz.