distillery. In most cases, single malts bear the name of the distillery, with an age statement and perhaps some indication of some special treatments, such as maturation in a port wine cask. Blended malt whisky is a mixture of single malt whiskies from different distilleries. If whisky is labelled "pure malt" or just "malt" it is almost certainly a blended malt whisky. This was formerly called a "vatted malt" whisky. Blended whisky is made from a mixture of different types of whisky. A blend may contain whisky from many distilleries so that the blender can produce a flavour consistent with the brand. The brand name may, therefore, omit the name of a distillery. Most Scotch, Irish and Canadian whisky is sold as part of a blend, even when the spirits are the product of one distillery, as is common in Canada. American blended whisky may contain neutral spirits. Cask strength (also known as barrel proof) whiskies are rare, and usually, only the very best whiskies are bottled in this way. They are bottled from the cask undiluted or only lightly diluted. Single cask (also known as single barrel) whiskies are bottled from an individual cask, and often the bottles are labelled with specific barrel and bottle numbers. The taste of these whiskies may vary substantially from cask to cask within a brand. National varieties American American whiskey is distilled from a fermented mash of cereal grain. It must have the taste, aroma, and other characteristics commonly attributed to whiskey. Some types of whiskey listed in the United States federal regulations are: Bourbon whiskey: made from mash that consists of at least 51% corn (maize) and aged in new charred oak barrels. Corn whiskey: made from mash that consists of at least 80% corn and is not aged, or, if aged, is aged in uncharred or used barrels. Malt whiskey: made from mash that consists of at least 51% malted barley Rye whiskey: made from mash that consists of at least 51% rye Rye malt whiskey: made from mash that consists of at least 51% malted rye Wheat whiskey: made from mash that consists of at least 51% wheat These types of American whiskey must be distilled to no more than 80% alcohol by volume, and barrelled at no more than 125 proof. Only water may be added to the final product; the addition of colouring or flavouring is prohibited. These