Little Valley Brewery in Yorkshire, northern England, has brewed 10,000 pints (5,600 litres) of three pale ales, bearing the names "In", "Out" and "IDK" (I Don't Know).
Punters are encouraged to order according to how they will vote in the June 23 referendum on Britain's EU membership, with each pint of "quaffable political dialogue" brewed to reflect the two camps.
"'In' is fruity and hoppy and strongly influenced by the continental attitude, while the second, 'Out' is a light ale with bold hints of euroscepticism and a dry bitter finish," said Sue Cooper, co-owner and founder at Little Valley Brewery.
The brewery will publish results of each beer's popularity before the vote, but the "In" brew received a high-profile endorsement on Friday following a visit by Labour Party deputy leader Tom Watson.
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"The Vote 'In' beer is an exceptional brew and must be drunk by as many people as possible!" he said.
The brewery, run by an Anglo-Dutch couple, relies on the continent for imports of hops, malts and yeast, and exports its finished products to beer buffs across the Channel.
"It's something we feel incredibly strongly about and will definitely be voting to stay when the time comes," said Cooper.
The Aire Bar in Leeds, which is stocking the "In" and "Out" brews, said that thirsty voters had sunk around 30 more pints in support of the EU, and that the ales had greased the wheels of political chat.
"Most people comment on it, it grabs the attention and has definitely sparked debate," bar staffer Rose Perry told AFP.