on draught

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on draft

Drawn or served from a large container, especially a keg, as opposed to individual bottles or containers. (Spelled "on draught" in British English.) We have a wide range of craft beers on draft, including some from our own in-house microbrewery.
See also: draft, on

on ˈdraught

(British English) (of beer) taken from a barrel (= a large container): This beer is not available on draught (= it is available only in bottles or cans).
See also: draught, on