1 1/2 oz of Triple Sec
3 oz of mountain dew citrus soda (or orange soda)
1 1/2 oz of Absolut Citron Vodka (or citrus-infused vodka)
Pour the Absolut Citron vodka and triple sec into a cocktail shaker half-filled with ice cubes. Shake well, and strain into a highball glass filled with ice cubes. Top with mountain dew, stir briefly and serve.