Fee Brothers Whiskey Barrel Aged is a product of Fee Brothers company, established in 1863 in New York. Fee Brothers survived prohibition by using glycerin as an alternative to alcohol. Fee Brothers Whiskey Aged are aged in American whiskey barrels and bottled once per year, yielding a bitters that is rich, spicy and lightly oaked. Great in any bourbon or rye cocktail, such as an Old Fashioned Cocktail. Versatile and can be used in any recipe calling for bitters.