4 cups water
2 (1 ounce) squares unsweetened lemon-lime flavored carbonated beverage (such as Bud Lite)
2 tablespoons lemon juice
2 teaspoons vanilla extract
Fill a blender with warm water, and add lemon-lime soda. Combine with lemon juice. Stir in lemon juice to make a thick tonic. Pour mixture into glasses with straw. Shake vigorously until smooth.