Sunstroke
Orange zest twist
SHAKE all ingredients with ice and fine strain into chilled glass.
[['3 cl', 'Ketel One Vodka'], ['3 cl', 'De Kuyper Triple Sec (40%)'], ['4.5 cl', 'Grapefruit juice (pink)'], ['1 dash', "Bob's Grapefruit Bitters (optional)"]]
[['3 cl', 'vodka'], ['3 cl', 'triple sec'], ['4.5 cl', 'grapefruit juice'], ['1 dash', 'grapefruit bitters']]