Cool Citrus Punch
["1 small can frozen orange juice concentrate, thawed", "2 small cans frozen lemonade concentrate, thawed", "1 (2 liter) bottle ginger ale or lemon-lime soda"]
["A day or two ahead, prepare an ice ring by freezing orange and/or lemon slices in a circular mold. Just before serving, empty cans of thawed concentrates into a large punch bowl. Stir to mix them thoroughly. Pour in the soda and add the ice ring."]
["orange juice concentrate", "ginger ale"]