Pour 0.35 oz of lime juice, 1 oz of pineapple juice, 0.15 oz of Campari, 0.35 oz of melon liqueur and 1 oz of vodka into a shaker
Add 2 dashes of grapefruit bitters
Fill the shaker with ice cubes and shake
Strain into a chilled cocktail glass
Garnish with a physalis