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. Once opened, the widget's ...

In the past few decades, Guinness revolutionized both draft beer systems and how stouts are canned. The key? Nitrogen, and a modified ping pong ball. You’re drinking a can of Guinness. As you near the ...

CNN — (CNN) — Guinness, like other Irish stouts, enjoys a seasonal popularity every St. Patrick’s Day. It has also been touted as being “good for you,” at least by its own advertising posters decades ...