containerful - the quantity that a container will hold

beer barrel, beer keg - a barrel that holds beer

breech, rear of barrel, rear of tube - opening in the rear of the barrel of a gun where bullets can be loaded

bung, spile - a plug used to close a hole in a barrel or flask

butt - a large cask (especially one holding a volume equivalent to 2 hogsheads or 126 gallons)

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"

keg - small cask or barrel

pickle barrel - a barrel holding vinegar in which cucumbers are pickled

shook - a disassembled barrel; the parts packed for storage or shipment

stave, lag - one of several thin slats of wood forming the sides of a barrel or bucket

spigot, tap - a plug for a bunghole in a cask

tun - a large cask especially one holding a volume equivalent to 2 butts or 252 gals

vessel - an object used as a container (especially for liquids)

wine barrel, wine cask - a barrel that holds wine