3 cups cubed watermelon
1 cup raspberries or blueberries (fresh or frozen)
1/2 cup orange juice
1/2 cup stevia (measure to taste)
club soda or sparkling water.
Mix first four ingredients in a blender until processed to a liquid. Refrigerate until ready to drink.
Pour 1/3 cup into a glass and fill with club soda. Enjoy.