BevBoost’s widget is a multichamber plastic contraption that sits inside a canned beverage and delivers a shot of flavor when it’s opened.

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 ago.

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 ago.

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 ago.

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.

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?