Nathan's Old Friend
Toschi cherry... cuz it's got enough grapefruit.
SHAKE all ingredients with ice and fine strain into chilled glass.
[['6 cl', 'Aviation American gin'], ['2.25 cl', 'Grapefruit juice (pink)'], ['1.5 cl', 'St-Germain elderflower liqueur'], ['1.5 cl', 'Campari Bitter liqueur']]
[['6 cl', 'gin'], ['2.25 cl', 'grapefruit juice'], ['1.5 cl', 'st-germain elderflower liqueur'], ['1.5 cl', 'campari']]