In 1997, Guinness released the floating, spherical widget you can find in cans today — which they call the "smoothifier" — to fix this problem. Carbon dioxide vs. nitrogen in beer. Breweries ...

Guinness revolutionized both draft beer systems and how stouts are canned. The key? Nitrogen, and a modified ping pong ball.

In the 1970s, Guinness developed a technology to get that nitrogen effect in a can. Since then others have followed suit. Now there are a number of packaged, nitrogenated beers available on store ...

You’re drinking a can of Guinness. As you near the bottom, something rattles around inside the can. You look inside and see, to your surprise, what looks like a ping pong ball. Was it a factory error?

Guinness cans, containing a widget to control the pour, also have some nitrogen. Guinness is also dispensed through a special tap that uses a mixture of carbon dioxide and nitrogen.

St. Patrick’s Day falls on Friday this week, and while there will be plenty of beer of all kinds consumed, one beer is almost synonymous with the holiday — Guinness ...

The nitrogen-filled plastic balls nestled in the regular cans have never done it for me, and despite my considerable efforts, I can wholeheartedly say I'd never poured a good pint of Guinness at home.