Place the chopped kiwis and sugar in a blender. Blend until smooth, about 30 seconds.

Add the lime juice to the blender and pulse once or twice to combine.

Pour the mixture through a fine mesh strainer into a pitcher to remove seeds if desired.

Slowly stir in the chilled sparkling water until evenly mixed.

Fill four glasses with ice cubes. Divide the kiwi mixture among the glasses.

Add a kiwi slice to the rim of each glass before serving.