1.5 oz. raspberry-flavored vodka
0.25 oz. fresh lemon juice
2 dashes gentian-based bitters
7UP®, as needed
Mix first 3 ingredients together in a shaker with ice.
Strain into an ice-filled Collins glass.
Top with 7UP.
Garnish with raspberries and a lemon slice.
Enjoy responsibly, for parties 21 and older, not to be shared with under age parties.