Ball inside a can of Guinness (the widget)

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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, which trickles into the hole along with a little bit of beer. The entire can is then pressurized.

Видео Ball inside a can of Guinness (the widget) канала Mr Grimes Show