Boker’s Bitters have a heritage. Founded by John G. Boker in 1828, these bitters gained popularity among the world’s finest watering holes amidst the Golden Age of mixed drinks, enhancing cocktails from New York City to Chicago. The preferred brand of Professor Jerry Thomas, author of “How to Mix Drinks or The Bon Vivant’s Companion,” Boker’s Bitters continue refining drinks with their classic natural botanicals. Try these bitters to improve your Prohibition-era libations. 100 mL.