It is now owned by the British-based multinational alcoholic beverage maker Diageo. It is one of the most successful alcohol brands worldwide, brewed in almost 50 countries, and available in over 120.
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The black stuff, Irish champagne, ebony nectar, black custard, a pint of plain, are all nicknames for this much loved Irish institution. There's no doubt that Guinness is one of the most famous beers in the world.