*To make the pink coconut water ice spheres, fill two Tovolo Ice Sphere molds with a quality pink coconut water like Harmless Harvest. Freeze the molds for at least 6 hours.
In a tall, heavy-bottomed glass, gently muddle the mint leaves and simple syrup.
Add two pink coconut water ice spheres to the glass and pour the rum and lime juice over.
Top with sparkling water, stir gently and serve with a straw. Garnish with a sprig of mint.