The difference between a single malt and every other style of whisky is not so vast, yet the final product is celebrated with good reason. Single malts are those which have been made entirely from malted barley (no other grain content), and made within a single distillery. Different ages of whisky can be used in the final package, but the youngest whisky is the one which must be displayed on the label (it is not uncommon for, say, a twelve-year-old expression to have a small amount of older whiskies added to give colour, richness and texture).