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The Widget

A widget1 is a device used to introduce nitrogen into canned beer to produce a firm head similar to draught beer.

The nitrogen is released into the beer when the can pressure drops after opening. The drink must be poured immediately to prevent the nitrogen escaping completely, as it is not very soluble in beer. The escaping nitrogen enables the formation of fine bubbles, resulting in an extremely stable head.


1 The term 'widget' is used to describe any of an assortment of undefined tools, mechanisms, or concepts.

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Entry Data
Entry ID: A187238 (Edited)

Edited by:
John the gardener says, "Free Tibet!"


Date: 18   October   1999


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Most of the content on h2g2 is created by h2g2's Researchers, who are members of the public. The views expressed are theirs and unless specifically stated are not those of the BBC. The BBC is not responsible for the content of any external sites referenced. In the event that you consider anything on this page to be in breach of the site's House Rules, please click here. For any other comments, please start a Conversation above.


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