An American straight whiskey is one that less than 160 proof (80% ABV) from a fermented mash of at least 51% corn, rye, malted barley, wheat or malted rye and has been age for at least two years in charred oak barrels. Straight whiskies may be produced from a blend of straight whiskies produced in the same state. Offering a coper or amber color and displaying notes of caramel, toffee and baking spices among others, these are generally used for mixing with soda or tonic or used in cocktails.