Pink Gin is an English cocktail made with a combination of Angostura bitters and Plymouth gin, hence its other name, Pink Plymouth. To prepare it, a cocktail glass is first chilled, then coated with bitters. Chilled gin is then added to the glass, which is traditionally garnished with a lemon rind.
A few ice cubes can also be added to the cocktail, if desired. It is believed that Pink Gin was invented by members of the Royal Navy, who wanted to make Angostura bitters more enjoyable by combining them with the sweet Plymouth gin (as opposed to dry London gin).