Pool Drink: Vodka Lemonade Slush 12 oz frozen lemonade concentrate 12 oz vodka 24 oz cold water zest from 1 lemon Lemon slices to garnish, if desired In a large bowl combine lemonade concentrate, vodka, water and lemon zest. Stir together until well combined. Pour lemonade mixture into a shallow freezer-safe pan. Freeze mixture for at least 8 hrs, stirring once halfway thru freezing. To serve, fluff ice crystals with fork and spoon into glasses for serving. Garnish with lemon slices.