Grapefruit Crush

Bahan-bahan (1 porsi)

• 4 oz (½ cup) fresh-squeezed grapefruit juice, from 1 large grapefruit
• 1 oz (2 tablespoons) vodka
• ½ oz (1 tablespoon) triple sec (orange liqueur)
• 2 oz (¼ cup) lemon-lime soda