Related Clues:

• What might be stored in there? Potassium, for instance?
• Cooper's work
• Might C. ask for potassium, for instance?
• By the sound of it, see 17 down for this
• One might have a century over 17 down for this
• Might C, get to ask for such a lot of drink?
• 'E's got about one kilogram for this container
• Might C ask for potassium, for instance?
• Might potassium, for instance, come by the barrel?
• The instance of potassium for the vessel
• Might C ask for potassium, for instance
• Might C ask for an example of potassium?
• Frat party vessel
• One is a little tubby
• Container for potassium, for instance