In Greek mythology, the large jar in Pandora’s story is called a pithos. A pithos was a large ancient Greek storage vessel, often used for commodities such as grain, oil, or wine.
Hesiod’s Works and Days uses the Greek word pithos rather than describing a small hinged box. The familiar expression “Pandora’s box” became dominant through later translation and retelling, especially after the Renaissance. That change transformed the vessel’s shape in popular imagination but did not change the basic plot.
An amphora is a different type of Greek ceramic vessel, usually recognizable by its two handles and narrower form. A krater was used for mixing wine and water, while a kylix was a drinking cup. Those terms are therefore plausible distractors but do not identify the container in the Pandora myth.