A wine-mixing vessel (krater) with a wide mouth and a deep, calyx-shaped body. Shape: Usually the body of the calyx krater is in two parts, the lower convex and the upper slightly concave in profile. The foot is in two degrees and is fairly high. The handles curve upward and are set opposite each other, at the top of the lower, convex section of the body. History: The earliest surviving example is by Exekias, who may be credited with inventing the shape. The shape continues until the end of red-figure. As the shape develops, the vessel grows steadily narrower, and more concave in the upper section; the lower section becomes more stemmed. Term: The body of the vessel takes the shape of the calyx (or bud sheath) of a flower, hence its modern name.