A group of three celadon glazed porcelain water containers. Rounded in shape, the three calligrapher accessories are characterized by slight variations in the shape and type of enamel used, which suggests a different place of production. The specimen equipped with two small circular handles, identified by an olive-colored glazing that reveals the relief underglaze decoration, is an example of the so-called Yaozhou production, or the "Northern Celadons" produced during the Northern Song dynasty, especially in the Henan province. The other two containers, on the other hand, could be attributable to the production of Longquan, also from the Song era in Southern China.