Blended whisky is a mix of two ingredients: grain whisky and malt whisky. The former, grain whisky, is distilled from a mix of cereal grains including rye, wheat, corn and barley, and it is distilled in continuous column stills. This process is efficient and cost-effective, although the final whisky doesn't have quite as much character as a malt whisky. Malt whisky, on the other hand, is distilled from malted barley in copper pot stills. Whilst less efficient to produce, its flavour has far more depth. Because of this, the master blender must carefully combine both grain and malt whisky to provide a value for money blend with a great flavour. Thanks to a host of very talented blenders, there some really excellent 30 year old blended whiskies to be found.