1 oz of Vodka
1 oz of sweet and sour mix
1/2 oz of grenadine syrup
1 oz of Midori melon liqueur (or watermelon liqueur)
1 oz of Watermelon Schnapps
Pour grenadine into a margarita or cocktail glass. Place some ice cubes in a cocktail shaker, and add the vodka, watermelon schnapps, Midori melon liqueur and sour mix to the shaker. Shake well, pour into the margarita / cocktail glass, and serve.