An important (some say the most important) component of Guinness on tap is the creamy head, a result of both CO2 and nitrogen being used to deliver the beer. The former causes the familiar, bigger ...

The Guinness widget is a tiny, plastic ball inside beer cans. During canning, pressurized nitrogen is added to the brew, which trickles into a hole in the widget.

How to pour the perfect Guinness from a can at home. Let the can chill for at least 24 hours before serving. The beer should be refrigerated at 46.4 degrees Fahrenheit.

Beer necessities . The Irish Times - Letters to the Editor. ... April 11th and 12th), I enjoyed reading people’s reminiscences of the various forms of bottles of Guinness.