Ever opened a can of Guinness and noticed a strange rattling sound when you shake it? There's a foreign object in there. But, it has a purpose. Follow Tech Insider: On Facebook More from Science ...
An curved arrow pointing right. Ever opened a can of Guinness and noticed a strange rattling sound when you shake it? There's a foreign object in there. But, it has a purpose. Produced by Kevin ...
Have you ever noticed the clink-clank of a tiny object rattling around the inside of an empty Guinness bottle or can? That little gadget is called a "widget," and you should be thankful for it.
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