Brewing cylindroconical vessels, through open stone vessels, to wooden vats. After the wort is cooled and aerated – usually with sterile air – yeast is added to it, and it begins to ferment. It is during this stage that sugars won from the malt are converted into alcohol and carbon dioxide, and the product can be called beer for the first time. Most breweries today use cylindroconical vessels, or CCVs, which have a conical bottom and a cylindrical top. The cone's aperture is typically around 60°, an angle that will allow the yeast to flow towards the cone's apex, but is
Low-alcohol beer commercial brewery, San Francisco's Anchor Brewing Company, also produces their "Anchor Small Beer" using the second runnings from their Old Foghorn Barleywine. The term is also used for commercially produced beers which are thought to taste too weak. The Middle East accounts for almost a third of worldwide sales of nonalcoholic and alcohol-free beer. Notable Islamic clerics in Saudi Arabia and Egypt have issued fatawa permitting the consumption of "alcohol-free" beers that can be proven to contain zero traces of alcohol. Alcohol-free beers such as Holsten, Barbican and Moussy are often available in stores and restaurants throughout the Arab world.