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Обикновен уиджет. Хайнекен също ги използват. Човекът се е изплашил, защото не е знаел. "Beer in cans with a widget and a quantity of nitrogen dissolved in the beer is the formula to present canned beers that taste and perform the same as the draught beers that the English are used to getting in their pubs. In 1989, Guinness was the first brewery to market such a system. They were soon followed by HEINEKEN and their English licensing partner Whitebread. The widget is a plastic capsule that floats on beer. It has four components: a bottom, a top and two small one-way valves called "duckbills". After assembly the capsule has a shape like a squad submarine."