Wash all berries and remove stems from strawberries.
Place berries in the pitcher and muddle gently to release their juices.
Add cranberry juice, lime juice, and simple syrup to the pitcher. Stir well.
Pour in the chilled Sprite slowly to keep carbonation.
Fill glasses with ice cubes.
Strain the mixture into glasses.
Garnish with fresh berries and mint leaves.
Notes
Keep Sprite chilled until ready to use for best results.The drink stays fizzy for about 2 hours at room temperature.Make the simple syrup ahead by mixing equal parts sugar and hot water until dissolved.For a sweeter drink, add more simple syrup in 1 tablespoon amounts.Store leftover mixture without Sprite in the fridge for up to 2 days.