Scotch whiskey is the beverage produced from the fermentation of grains (originally barley) that is later aged. In order to be considered Scotch, it needs to be prepared in a specific manner according to law. It must be distilled twice and matured for at least 3 years. Over the years, whiskey production has changed and grain spirit has been added to create blended whiskey. Scotch whisky can come in two types: malt and grain whisky. The 3 types of blends are created from these two types: blended malt Scotch whisky,blended grain Scotch whisky and blended Scotch whisky. Because of diverse preparation methods, alcohol by volume (ABV%) is difficult to establish, but it can vary anywhere from 40% to 95%, in some cases. Scotch is usually taken straight, but it has also become a staple in cocktail making. Another common practice is to consume after diluting with water.