Fee Brothers Lemon Bitters is a concentrated flavoring agent used in cocktails and other drinks. It is made from a blend of lemon peels and spices that are steeped in alcohol to extract their flavors. The resulting bitters have a tart and citrusy taste with subtle hints of spice and bitterness. They are commonly used to add a bright, refreshing twist to classic cocktails like the gin fizz or the sour, and can also be used in mocktails or to enhance the flavor of sparkling water or tea.