product is Guinness Draught, a 4.2% ABV dry stout that is one of the most successful beer brands worldwide. For many years a portion of the drink was aged to give a sharp lactic flavour, although Guinness has refused to confirm whether this still occurs. The thick creamy head is the result of the beer being mixed with nitrogen when being poured. It is popular with Irish people both in Ireland and abroad and, in spite of a decline in consumption over recent years, is the best-selling alcoholic drink of all time in Ireland where Guinness & Co. makes almost €2 billion annually. The brewery also produces Guinness Original, a 4.3% ABV version of the Draught, without the nitrogen; Kaliber, a low alcohol pale lager; Guinness Bitter, a 4.4% bitter sold in a can with a widget; and the 7.5% Guinness Foreign Extra Stout. Varieties Guinness stout is available in a number of variants and strengths, which include: Guinness Draught, sold in kegs, widget cans, and bottles: 4.1 to 4.3% alcohol by volume (abv); the Extra Cold is served through a super cooler at 3.5 °C (38.3 °F). Guinness Original/Extra Stout: 4.2 or 4.3% ABV in Ireland and the rest of Europe, 4.1% in Germany, 4.8% in Namibia and South Africa, 5.6% in the United States and Canada, and 6% in Australia and Japan. Guinness Foreign Extra Stout: 7.5% abv version sold in Europe, America, Africa, the Caribbean and Asia. The basis is unfermented but hopped Guinness wort extract shipped from Dublin, which is added to local ingredients and brewed locally. The strength can vary, for example, it is sold at 5% ABV in China, 6.5% ABV in Jamaica and East Africa, and 8% ABV in Singapore. In Nigeria a proportion of sorghum is used. Foreign Extra Stout is blended with a small amount of intentionally soured beer. Guinness Special Export Stout, sold in Germany, Belgium, and the Netherlands, originally brewed in 1945 for the NAAFI to be sent to British troops stationed in Europe. Guinness Bitter, an English-style bitter beer: 4.4% ABV. Guinness Extra Smooth, a smoother stout sold in Ghana, Cameroon and Nigeria: 5.5% ABV. Malta Guinness, a non-alcoholic sweet drink, produced in Nigeria and exported to the UK and Malaysia. Guinness Mid-Strength, a low-alcohol stout test-marketed in Limerick, Ireland in March 2006 and Dublin from May 2007: 2.8% ABV. Kaliber, a premium alcohol-free lager. It is brewed