Canned Beer Week: Why beer widgets in British/Irish cans?

Canned Beer WeekSurveying the field of British and Irish canned beers—Guinness, Murphy’s, Old Speckled Hen, Boddingtons, etc.—it’s obvious that all of these come with the nitrogen beer widget. But the question occurred to me: why do we only see these widgets used in these canned beers from the UK and Ireland? Why not others? Why not American beers?

A little background may be in order. A beer widget is the plastic device added to the can that contains pressurized nitrogen gas; when the can is opened, the nitrogen escapes and dissolves into the beer and produces a finer, smaller-bubbled carbonation and head that is thick and creamy. The body of the beer, likewise, takes on a smooth and creamy feel as well.

Guinness developed and popularized the widget; they were researching it as early as 1968 and in the late 80’s, introduced the widget can (which subsequently appeared in the US in 1990).

Since then, the widget can has appeared with other Irish and UK brews, as mentioned above. Which takes us back to the question of why only those beers?

The best partial answer I can find is from this Beer Hunter article that first appeared in 1991. Michael Jackson postulated that it’s a way to capture the British pub experience—the draught-only, cask ale style of beer—in the can for mass market appeal.

This is the only country to have persisted on a large scale with cask-conditioning: the practice of delivering barrels of beer in a not-quite-ready state (with some unfermented sugars, and live yeast) to the pub, so that it can complete its development in the cellar. Because this secondary fermentation can only take place at a natural cellar temperature, and produces only a light, natural carbonation, cask-conditioned beer has none of the aggression of colder, gassier, products. It is soothing and sociable. It fits the mood of the pubs and cannot easily be made available at home….

Brewers would like to retain a "draught" character in bottled or canned beer. In the United States and Japan, the word "draught" on a bottle or can usually means that the beer has been filtered to the point of sterility. This strips out flavour and body, but removes the need for pasteurisation.

The newest trick – being used in the British Isles to make products identified as "draught" in cans – retains pasteurisation but addresses itself to another area of taste: creaminess, softness and gentle, low carbonation In fermentation, beer produces only one gas: carbon dioxide. When it is hand-pulled, the manual pump action introduces air. Within air is nitrogen, and that enhances the texture and head by producing bubbles smaller than those created by carbon dioxide….

Not only does the nitrogen make the beer more creamy, and produce a better head, it also protects against oxidation. The brewer can therefore permit the beer to be less carbonated. The "canned draught" products have levels of carbonation similar to those in cask-conditioned ales, and less than half those in some bottled beers.

This is a compelling case for the British cask/pub experience in a can, so then: why haven’t other canned beers (particularly American) adopted this? Could it simply be because only the British care enough about this experience to emulate it?

Some wild speculations (I may be totally off here):

  • Since Guinness owns the patent on the beer widget, it can only be produced in Ireland and the UK. (This doesn’t seem entirely likely.)
  • Since the canned craft beer movement in American is only just getting off the ground, it’s simply a matter of time; i.e., American "microcanners" are still getting used to the canning process and experimenting with widgets is inevitable but not there yet.
  • Alcohol laws (or FDA or something?) doesn’t allow craft brewers to add widgets/foreign objects to alcohol (cans). Imports exempt?
  • Not cost effective for small brewers, who are only just able to start affording canning systems.

Can anyone shed some light on the subject?

Updated: Fixed some geographic problems; see the comments.


  1. Minor detail here:
    Guiness is Irish. Ireland is NOT in the UK. Nor is Ireland and/or Guiness considered British. In fact, the Irish find such mistakes to be offensive.

    More to the point though – I think the Guiness Widget is (or used to be anyway) a disc that would push itself to the bottom of the can. A Boddington’s widget is a small cylinder that looks like a big horse pill. Not sure if they are the same, and not sure if they under the same patent.

  2. My apologies on the UK mixup; Northern Ireland is but I hadn’t fully clarified my (mis)understanding on that, particularly to any Irish and/or UK readers. My intent though, was to include both UK and Irish beers, since the widget originated with Guinness and has since extended to the others.

    The original Guinness widget was attached to the bottom of the can; the current ones (different patents/models maybe) are floating ones.

    My patent theory was weak, anyway. 🙂

  3. Interesting question. I would say that the canned craft beer movement hypothesis has some merit. The vast majority of canned beers in the U.S. are of the American Light Lager variety, for which a beer widget would be counterproductive. It also seems that there is some friction experienced by craft brewers moving towards cans, and the switch to both a can and the beer widget may currently be deemed to drastic to be widely accepted. Finally, the notion that there is simply not a demand for such a device may also be true. Perhaps most Americans simply have not developed a taste for that style of beer due to lack of exposure.

  4. to the first poster…

    First off its spelt ‘Guinness’
    The beer is based on the porter style that originated in London in the early 18th century. Sadly I have to say the parent company has been headquartered in London since 1932 and was later merged with Grand Metropolitan plc and developed into a multi-national alcohol conglomerate named Diageo. So its steadily losing its ‘Irishness’..
    the good news is The Guinness brewery in Park Royal, London closed in 2005. The production of all Guinness sold in the UK and Eire was switched to St. James’s Gate Brewery Dublin.

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