16 Fresh Key Limes 
1 cup sugar 
Water & Ice

Cut the Key Limes in half and squeeze juice into a pitcher with a citrus press. Add sugar and stir well, then let stand for 5 minutes to dissolve and stir well again.  Add water to taste, about 5 cups, and pour over ice.  You can also use 1 cup of bottled Key Lime Juice instead of fresh Key Limes.