
Pink grapefruit juice is the juice pressed from a red- or pink-fleshed grapefruit (Citrus paradisi), a tart, faintly bitter citrus juice.
Bitterness leads — a distinct grapefruit edge over tart acidity, softened by a moderate sweetness and a bright, fragrant citrus aroma.
Reached for when a drink needs a citrus with body and a bitter backbone rather than plain sourness, it works as a souring and balancing element, shaken with the build to aerate and integrate; bottled versions are often sweetened or blended, shifting the balance from fresh-pressed. Dosed as a featured measure it defines a drink, or in a small squeeze as a bitter-aromatic accent.
Generic white or yellow grapefruit juice is the closest swap — the same fruit and the same tart-bitter character — trading only the rosy colour and slightly gentler, sweeter edge for a paler, sharper juice; as a small accent, another citrus can stand in if sourness rather than the grapefruit flavour is what matters.
Pomelo juice
Pomelo is one of grapefruit's parent species, not the same fruit; its juice comes from a larger citrus with thick pith and is generally milder, less acidic and less bitter than grapefruit juice.
The grapefruit is a hybrid of the sweet orange and the pomelo, and its pink and red varieties owe their colour to lycopene and beta-carotene in the flesh. Squeezed fresh or sold bottled, the juice is acidic at a pH around 3, and its characteristic bitterness comes largely from the flavonoid naringin.
Fresh juice oxidises and loses aroma quickly, and its bitterness can build over time, so it is best pressed and used fresh.

Mai Tai (Beaumont-Gantt's)
Jamaican-style overproof aged rum

Zombie
Caribbean aged rum

Three Citrus Garibaldi
Amaro

Grapefruit Daiquiri
White rum

American Breakfast
Bourbon

Bermuda Rum Swizzle
Light gold rum, Dark rum

Floridita Margarita
Tequila reposado

Grapefruit Daiquiri n/a
Non alcoholic

China Blue Cocktail
Lychee liqueur, Blue Curaçao

Grapefruit Gin Cocktail
London dry gin

Oriental Tartini
London dry gin

Sauvignon Blanc Punch
Sauvignon blanc wine

Chanbanger
Caribbean aged rum

G. G And G
London dry gin

Grapefruit Julep
Vodka

Money Penny
Caribbean aged rum

Navigator
London dry gin

Navy Grog
White rum, Caribbean aged rum, Navy rum

Wah-Wah
Pisco

Gentle Breeze
Non alcoholic

Universal Shot
Green melon liqueur, Vodka

Western Sour
Rye whiskey

Florida Punch

Judy Punch
Non alcoholic