Black satin interior glaze. Exterior black satin geometric designs. Unglazed areas vary from soft white to warm sand color. Stoneware clay. Food safe. Microwave safe. Dishwasher safe although handwashing is recommended. Created by John Foelber. JF stamp on bottom.  This one is the largest of the series. Holds 20oz.  4"h x 5.5"w.