In a low ball glass, add a couple leaves of fresh mint, 4-5 raspberries, and the rum if adding. Muddle gently, lightly smashing the mint and raspberries to release their flavors.

Add the slice of lime, then fill the glass with ice. Add a splash of your sparkling raspberry water and a little bit of fresh lime juice, then finish with Sprite.

Garnish with mint leaves and raspberries.