A 17th century product decorated in underglaze iron with grapes hanging on vines, this jar is 53.3mm in height and 19.5mm and 19.2mm in diameter at its mouth and bottom respectively. It is at present in the possession of Ewha Women's University Museum. With its grapes and vines painted in well-balanced proportion on its surface, whose color, in turn, gives excellent harmony produced from a peculiar combination of milk-white and light-blue glazes, the jar is generally considered to be the best of the Yi Dynasty iron-painted porcelain wares. Although its origin goes back to the Koryo Dynasty, the Yi Dynasty porcelain was refined throughout the 500-year period of the dynasty with the creative addition of its own beauty. In contrast to the aristocratic nature displayed in the former, simplicity, natural features of Korea, and people's emotions in their daily life are reflected in the later.