Chill your glass by filling it with ice.
In your shaker:
• Squeeze 2 cl of lemon juice, then add 4 cl of pineapple juice and 4 cl of grapefruit juice.
• Add the measures of 40° and 50° rum.
• Replace the ice in your glass with fresh ice.
• Shake vigorously, then strain into your glass.
• Drop in 1 cl of grenadine syrup.
• Garnish with a pineapple wedge and a frangipani flower.
