To do this, you need to negate the effects of the can’s widget with a pin. A Guinness can’s widget is filled with nitrogen.

Liquid nitrogen, a widget, and the beer itself are added to each can of Guinness before they're sealed. The liquid nitrogen ...

The entire can is then pressurized ... such as the experience you get when drinking a Guinness - brewers infuse the ale with nitrogen rather than with carbon dioxide. Nitrogen bubbles are smaller ...

But how would Guinness achieve the same result from stout poured from a can? In 1968, two brewers invented the widget, a ping-pong sized plastic ball that releases nitrogen into the pressurized ...

Ordering a Guinness on draft takes longer than most other beers. Part of the reason is the gas used to carbonate it — nitrogen. William Lee, a professor of Industrial Mathematics at the ...