2 oz of Absolut vodka (or Vodka)
2 oz of Malibu coconut rum (or Coconut Rum)
6 oz of chilled nugrape soda (or Champagne Soda )
Combine the vodka and rum in a cocktail shaker half-filled with ice cubes. Shake well and strain into a highball glass. Add the chilled grape soda and serve.