To do the challenge correctly, though, you have to split the G on your first drink, which means that you ... as the Guinness ...

London marathoner drinks wine glass at every mile in viral challenge - ‘It’s my first experience of this going absolutely mad ...

To celebrate Saint Patrick's Day on Monday, TODAY’s Carson Daly demonstrated for viewers how to participate in the drinking challenge. Using a pint glass emblazoned with the Guinness logo ...