01 -
Fill a cocktail shaker with ice.
02 -
Add blue raspberry syrup, cranberry juice, grenadine, and lemon juice.
03 -
Shake well until chilled.
04 -
Strain into a tall glass filled with fresh ice.
05 -
Top with lemon-lime soda and gently stir to create the purple color gradient.
06 -
Garnish with a lemon twist or blackberry and enjoy.