Bottle with a Flattened Side, Korea, late Unified Silla period (676-935) or early Goryeo (918-1392). Stoneware With Incised Designs. Overall: 25.1 cm; Diameter: 15.9 cm. The Cleveland Museum of Art, John L. Severance Fund 1999.92.

Its gray color and shimmering glaze both are the result of the reduction of oxygen in the closed kiln chamber built on hillsides.

By the 700s, this type of bottle started to be produced as a utilitarian vessel and was enjoyed among ruling elites. The flattened example like this may have served as a portable wine bottle.