In a shaker or mixing glass, add a handful of fresh mint leaves, along with sugar and freshly squeezed lime juice. Muddle until fragrant for about 15 seconds, ensuring the sugar has dissolved.

Add coconut rum, white rum, and chilled coconut milk to the muddled mixture. Stir or shake gently for about 10-15 seconds until fully combined.

Fill a highball glass halfway with ice cubes and pour the cocktail mixture into the glass until three-quarters full.

Slowly add sparkling water to fill the glass, enjoying the fizz and the visual appeal of the bubbles.

Garnish with extra mint leaves and a sprinkle of pomegranate arils for color and flair.