That little ball, known as a widget, was invented by Guinness brewers Tony ... all the pressure inside the can is released.

Arthur Guinness, for whom the stout is named, began brewing ale in 1759, and at the time, porter beer ... a can? In 1968, two brewers invented the widget, a ping-pong sized plastic ball that ...

Have you ever noticed the clink-clank of a tiny object rattling around the inside ... beer cold, but when served warm, the beer exploded everywhere after the can was cracked open. In 1997 ...