Cup corals grow as wide, shallow bowls, layered plates opening outward around a hollow center, as if the reef had decided to set the table. Made of glazed ceramic and measuring 4.75 by 2 inches, the Teal Cup Coral has an open bowl shape, a gently uneven rim and a teal glaze that sits right between the blues and greens of the reef. The center darkens, the rim lightens, and the bowl reads deep even on a flat wall. It hangs on one screw. It will not hold soup.