1. For each serving of soda, pour ¼ cup grapefruit juice into an ice-filled glass; add 2 Tbsp. Grapefruit-Thyme Simple Syrup. Top with 1 cup grapefruit-flavored sparkling water. Garnish with grapefruit slices and thyme sprigs, if desired.
   

‍

Grapefruit-Thyme Simple Syrup:

‍In a medium saucepan, heat 1 cup granulated sugar, 1 cup water and ¼ cup fresh grapefruit juice over medium heat for 5 minutes or just until sugar is dissolved, stirring occasionally. Remove from heat. Stir in 4 large strips grapefruit peel and ¼ cup tightly packed fresh thyme sprigs. Let stand, uncovered, at room temperature for 1 hour. Store syrup in a tightly covered container in the refrigerator up to 2 weeks.