This flat bottle (pyeonbyeong) is formed in the characteristic manner of the type, with both faces of the body pressed to an even, flattened profile. A thick black glaze is applied across the entire surface, and pooling where the glaze has run and collected is visible around the foot ring. The glaze surface is smooth and lustrous, while the base of the foot ring is left unglazed, exposing the bare clay body. The piece is presumed to date to the first half of the sixteenth century.