Ever wondered why there’s a plastic ball in your can of Guinness? It’s not just a quirky feature—it’s brilliant beer science.

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 ...

A widget is a hollow, spherical piece of plastic with a tiny hole in it - it looks like a little ping pong ball. During the canning process, brewers add pressurized nitrogen to the brew ...