FEE BROS BITTERS 4 oz. This bottle of Fee Brothers Old Fashion Aromatic Bitters is a classic cocktail flavoring for any bar. Made with Angostura bark, along with other spices and citrus oils. Used in a Manhattan, Old Fashioned, Planter's Punch and many other cocktail favorites. Opened in 1863, Fee Brothers of Rochester, New York, is in its fourth generation of manufacturing top quality cocktail mixes, bitters, flavoring syrups and other beverage ingredients.