1 1/2 oz citrus vodka
4 oz sweet and sour mix
1 splash cranberry juice
1 splash lemon-lime soda

Pour the citrus vodka, sweet and sour mix and cranberry juice into a cocktail shaker half-filled with ice cubes. Shake well. Strain into a collins glass almost filled with ice cubes. Top with lemon-lime soda. Float a lemon slice on top, and serve.