
Saline solution is a mixture of salt dissolved in water, dosed into drinks as a flavour-adjusting additive.
Cleanly saline, with no aroma of its own; it reads as savouriness rather than a distinct flavour.
Dropped from a dasher or dropper in tiny amounts near the end of the build, it suppresses bitterness, rounds acidity, and lifts perceived sweetness without making a drink taste salty.
A few grains of dry salt dissolved directly into the drink, or a pinch of flaky sea salt.
Bartenders prepare it by stirring table or sea salt into warm water until fully dissolved, most often at a ratio of roughly one part salt to four or five parts water, then bottle it for drop-by-drop use.
Keep in a clean sealed dropper bottle; the salt concentration resists spoilage, but refrigerate if made with unboiled water.

Cosmopolitan Cocktail (1934 recipe)
London dry gin

Italian Mezcal Margarita
Tequila reposado

Mango Vodka Sour
Mango vodka, Mango liqueur

Mojito (Cuban-style)
White rum

Rhubarb Gimlet
London dry gin

Spicy Tequila Espresso Martini
Tequila blanco

Strawberry Daiquiri
Light gold rum

Caramel Whiskey Sour
Bourbon

Negroni Flip
London dry gin, Red bitter, Carpano Antica Formula vermouth

Pomegranate Cosmopolitan
Vodka

Sake Negroni
Red bitter, Sake, Dry vermouth

Espresso Margarita
Tequila reposado

Raspberry Margarita
Tequila reposado

Amaretto Stone Sour
Amaretto liqueur

Gold Rush
Bourbon

Mock Margarita

Raspberry Martini
Vodka

Spiced Margarita
Tequila blanco

Watermelon Cosmo
Watermelon vodka

Blood Orange Daiquiri
White rum

Bourbon Smash
Bourbon

Cherry Margarita
Tequila reposado

Cucumber Rum Collins
White rum

Oriental Tartini
London dry gin