A bucket is a vessel used to carry objects and liquids (typically water). They might be made of wood, leather or metal. They might be banded with metal although wood was more common. The shape of the bucket might also be the reverse of the shape of modern buckets with the top being narrower than the base, particularly in the early medieval period.
Buckets designed to hold liquids (wet buckets) were made by coopers but dry buckets could be made by anyone with rough skills as only the wet buckets require the skills of a cooper to ensure a watertight(ish) fit.