courtesy of ‘furcafe’
A long drink, a term with which you might not be familiar, is a bartender’s term for a cocktail which is longer on non-alcoholic mixer than it is on base spirit. You may already know some long drinks as highballs, a slightly younger name which refers to a long drink made with just a single base spirit and a single mixer, often with a fruit garnish. A gin and tonic is a highball, but a Tom Collins (containing not only gin and soda but sugar and lemon juice) is a long drink. The Tom Collins, by the way, gave its name to the archetypical tall glass in which these drinks are served. A highball glass is usually synonymous with a Collins glass (and vice versa).
Cocktails follow formulas, and the combination of a single base spirit and a particular mixer often lends its name to some other concoction made with the same mixer and a different base spirit. The Tom Collins, for instance, begat the Vodka Collins. You could ask a bartender for a Whiskey Collins, and while he or she might look at you funny they’d know exactly what you mean without having to stop to think. Some names have lost popularity over time (Mamie Taylor, anyone?), but others are still current and show up in all sorts of interesting combinations. The Mojito, by the way, is also a long drink; replace the rum with gin and it becomes a Southside; add lemon to that and it turns into a Major Bailey. Formulas! They’re magic!