1 (6 oz.) can frozen lemonade (or limeade)
1 (14 oz.) sweetened condensed milk
1 (8 oz.) Cool Whip
1 (9 inch) graham cracker crust
1-2 drops food color, optional

Combine lemonade (or limeade), milk and food color; stir well. Fold in Cool Whip. Pour into crust and freeze until firm, 4 hours or overnight.

Garnish with lemon or lime slices and Cool Whip as desired. Serves 8. Remove pie from freezer 15 minutes before serving to thaw.