- 1 1/2 cups sparkling water
- 2 (2″-long, 1″-wide) grapefruit peels
- 2 teaspoons fresh grapefruit juice
- Pour sparkling water into a glass filled with ice. Twist 1 grapefruit peel and rub rim of glass. Drop both peels into glass. Stir in grapefruit juice and serve.