Squeeze the juice from the oranges and lemons. You should have about 1 C. of juice. Pour into a pitcher. Add the sugar and water and stir until the sugar dissolves. Serve the cooler in tall glasses over ice, garnished with lemon slice or strawberry, if desired.This citrus cooler is great for a picnic! For more picnic recipes, check out our collection of 150 Picnic Potluck Recipes!