1 oz of Absolut Citron Vodka (or citrus-infused vodka)
1 tbsp of Lime Juice
2 1/2 oz of 7-up soda (or Sprite)
1 tsp of sugar
Pour the Absolut Citron into an 8-oz highball glass filled with ice cubes. Fill with 7-up, and add lime juice. Sweeten with sugar. Top with a twist of lemon, and serve.