Askos (Ancient Greek ἀσκός "tube"; plural: ἀσκοί - askoi) is the name given in modern terminology to a type of ancient Greek pottery vessel[1] used to pour small quantities of liquids such as oil.
It is recognisable from its flat shape and a spout at one or both ends that could also be used as a handle.
An example of this is UC47602 in the Petrie Museum's collection, which is a Black Glazed vessel with an almost metallic appearance and was originally produced in Greece (the main production was in Attica), Etruria, and was excavated in Memphis.
The early Christian sect of the Ascitae takes its name from them.
[2] Media related to Askoi at Wikimedia Commons