tequila, triple sec, and lime juice
The (perhaps) most popular cocktail in the world apparently began as a Tequila Sidecar (amongst other names) in the 1930s at the hands of mixologists in various places, finally gaining its name in the late 1940s; from there, the drink was everything to tequila marketing and, thus impelled, became many things. See also daisy (“margarita” in Spanish).
We will add a sample recipe and related discussion, here, soon. —Ed.
Oxford Companion to Spirits and Cocktails, p. 438–41; barware icons courtesy of Haus Alpenz