Cut off the tops from two Zespri™ SunGold™ Kiwifruit. Cut each into 1cm thick slices. Use a 4cm heart-shaped cookie cutter to cut a heart from 8 slices. Set hearts aside on a plate.
Place the remaining 4 Zespri™ SunGold™ Kiwifruit in a high-speed blender jug. Add lime juice, mint leaves, and sugar, then blend until smooth.
Half-fill 8 serving glasses with crushed ice. Pour the Kiwifruit mixture over the ice, then top up with a little sparkling mineral water.
Serve with straws, garnish with mint sprigs, and decorate with Zespri™ SunGold™ Kiwifruit hearts on the edge of the glasses.