Related Clues:

• Cask in which beer is kept under pressure
• Barrel of beer
• Place for a beer pump
• Armory container
• Beer container almost dry — add litres?
• Save about litre in cask
• Cylinder with metal hoops
• Below-the-bar item
• Party item that has a tap
• Pony ___
• Tap takeover unit
• Container for pickles
• It's stuffed with gunpowder
• Container with a tap
• Sort of chest that may be scraped