The Blinker was first mentioned in print in Patrick Gavin Duffy’s 1934 bartending book The Official Mixer’s Manual and was resurrected in Ted Haigh’s 2009 Vintage Spirits and Forgotten Cocktails. It’s a simple and elegant concoction, essentially a variation on a classic Whiskey Sour and a close cousin to the Ward Eight. The drink’s original incarnation called for rye whiskey, grapefruit juice, and grenadine, a common cocktail sweetener made with pomegranate juice. In recent years, however, fans of the cocktail have found that substituting raspberry syrup instead renders a far more delicious version of the drink.