Why does guinness have a ball

It looks a little like a mini ping pong ball, Business Insider says. In bottles of Guinness with widgets, the device is more like a rocket, and is around three inches long. But the pressure inside the widget remains higher than the pressure in the beer around it - due to the tiny hole which allows gas to escape. This process makes the nitrogen inside the widget squirt into the beer, creating a burst of tiny nitrogen bubbles that rise to the top of the beer.

According to the Guinness website, Guinness bottles or cans should be chilled for at least 24 hours before serving. To break down the science of it all, The U. Sun has some answers. In bottles of Guinness with widgets, the device is more like a rocket, and is around three inches long. The whole can is then pressurized. The Sun continues, "The pressure inside the can drops when it is opened, to equalise with the pressure in the room. But the pressure inside the widget remains higher than the pressure in the beer around it — due to the tiny hole which allows gas to escape.

This process makes the nitrogen inside the widget squirt into the beer, creating a burst of tiny nitrogen bubbles that rise to the top of the beer. All of this being said, there's a very important fact that goes into drinking canned beer: You are not supposed to shake the can. Guinness bottles or cans can be chilled the day before, but no shaking is required. False advertising? As good as Guinness on tap? Depends on whom you ask.

Impressive piece of technology? Nitrogen, instead of carbon dioxide, is what gives Guinness its famous foamy head.