Beer is one of the world's oldest beverages, considered the drink of kings and gods and hero of many legends and myths by seniority. The beer is traditionally made with grains of barley and other cereals, basically flavored with hops and other plants. There are now many types of beer depending on its preparation or its ingredients. They differ according to the type of fermentation that can be high or low or spontaneous fermentation, distinguishing also the style of preparing the various countries, the most popular German style, Belgian, Italian, Irish or British.