Using a martini shaker, add ice, 2 oz. sour apple liqueur, 1 oz. vodka, and 3 oz. lemon-lime soda. You can use more or less depending on how strong you want the drink. Cover shaker, swirl, and strain into a martini glass. Add a maraschino cherry and you can even add a splash of cherry juice. A sugared rim and gummie savers also make a good garnish. Mmm... tasty!