amphora, ancient vessel form used as a storage jar and one of the principal vessel shapes in Greek pottery, a two-handled pot with a neck narrower than the body. There are two types of amphora: the neck amphora, in which the neck meets the body at a sharp angle; and the one-piece amphora, in which the neck and body form a continuous curve. The first is common from the Geometric period (c.900 bc) to the decline of Greek pottery; the second appeared in the 7th century bc. The height of amphorae varies from large Geometric vases of 5 feet (1.5 metres) to examples of 12 inches (30 centimetres) or even smaller (the smallest are called amphoriskoi). The average normal height is about 18 inches (45 centimetres). Amphorae, which survive in great numbers, were used as storage and transport vessels for olives, cereal, oil, and wine (the wine amphora was a standard Attic measure of about 41 quarts [39 litres]) and, in outsize form, for funerals and as grave markers. Wide-mouthed, painted amphorae were used as decanters and were given as prizes.