Bored with your water? Drop in a few watermelon-mint ice cubes! To make the cubes, blend 4 cups fresh, cubed watermelon (no rind or seeds) in a blender until smooth. Then pour the puréed watermelon into an ice cube tray, add a mint leaf to each cube and freeze. After you try this recipe, get creative by tailoring the recipe to include more of your favorite fruits!