The Rusty Nail cocktail, a classic Scottish-inspired drink, emerged in the mid-20th century, combining scotch whisky with Drambuie, a liqueur made from whisky, honey, herbs, and spices.

For someone as renowned as Sinatra was and still is, his favorite cocktail is actually quite simple. Meet the Rusty Nail, a cocktail made out of scotch and Drambuie, also known as whiskey liqueur.