Related Clues:

• Frat party vessel
• Might C. ask for it? (6)
• One is a little tubby
• Might C ask for this?
• Container for potassium, for instance
• Have a shot at double this container
• The example of a barrel of potassium
• Container for the example of potassium
• There's nothing liquid in the gun's one
• Bulk beer buy
• Tun, for one
• It's tapped out
• Tap setting
• Tube on a gun
• Beer container from tavern takes about a litre