Add the Pineapple: Place pineapple chunks into a highball glass.
Pour in Syrup: Add pineapple simple syrup over the fruit.
Muddle Everything: Crush the pineapple gently into the syrup until juicy and mixed.
Fill with Ice: Add enough ice to fill the glass.
Pour in Soda Water: Slowly top with sparkling water or soda water.
Stir Well: Mix everything together so the flavors combine.
Garnish: Add pineapple leaves and extra pineapple pieces if you want.
Serve Immediately: Best while the bubbles are still lively.