In blender, combine pink lemonade and daiquiri frozen concentrates, rum, if using, and water; add ice cubes. Pulse until blended and frothy, about 1 minute. Float berries on the surface for a special garnish.
• 1 can (295 ml) pink lemonade frozen concentrate (unthawed)
• 1 can (250 ml) strawberry daiquiri frozen concentrate (unthawed)
• 250 ml (1 cup) white rum (optional)
• 250 ml (1 cup) water
• 1 l (4 cups) ice cubes
• Sliced strawberries, for garnish