hogshead a large cask especially one holding 63 gals
hoop,
ring a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling; "there was still a rusty iron hoop for tying a horse"
barrel -
A roundvessel or cask, of greater length than breadth, and bulging in the middle, made of staves bound with hoops, and having flat ends or heads. Sometimes applied to a similar cylindrical container made of metal, usually called a drum.
barrel -
The quantity which constitutes a full barrel. This varies for different articles and also in different places for the same article, being regulated by custom or by law. A barrel of wine is 31 1/2 gallons; a barrel of flour is 196 pounds; of beer 31 gallons; of ale 32 gallons; of crude oil 42 gallons.
barrel -
A solid drum, or a hollow cylinder or case.
A barrel or cask is a hollow cylindrical container, traditionally made of vertical wooden staves and bound by wooden or metal hoops. Traditionally, the barrel was a standard size of measure referring to a set capacity or weight of a given commodity. For example, a beer barrel was originally a 36 gallon capacity while an ale barrel was a 32 gallon capacity.
OmegaWiki Dictionary
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barrel A unit of volume used to measure crude oil and other petroleum products and equivalent to 42 US gallons (158.9873 liters).