Fill a shaker with ice.
Add vodka (or gin), grapefruit juice, lime juice, and simple syrup.
Shake well for about 10 seconds.
Strain into a tall glass filled with ice.
Top with sparkling water and give it a gentle stir.
Garnish with a grapefruit wedge and a sprig of mint.

🌿✨ Citrus Secrets:
Add a pinch of salt to the shaker to subtly boost the citrus flavor.
Swap sparkling water for sparkling rosé if you want a boozy brunch version.
For a spicy twist, rim the glass with Tajín or chili salt 🔥