Typology of Greek vase shapes
The pottery of ancient Greece has a long history and the form of Greek vase shapes has had a continuous evolution from Minoan pottery down to the Hellenistic period. As Gisela Richter puts it, the forms of these vases (by convention the term "vase" has a very broad meaning in the field, covering anything that is a vessel of some sort) find their "happiest expression" in the 5th and 6th centuries BC, yet it has been possible to date vases thanks to the variation in a form’s shape over time, a fact particularly useful when dating unpainted or plain black-gloss ware.
Source: Wikipedia — Typology of Greek vase shapes (CC BY-SA 4.0)