2 (3 oz.) pkgs. flavored gelatin
2 c. boiling water
4 c. cold water
2 (46 oz.) cans unsweetened pineapple juice
2 c. sugar
7-Up, ginger ale, Sprite, etc.

Dissolve flavored gelatin in boiling water. Stir in cold water, juice and sugar. Stir until sugar dissolves. Pour into 3 half-gallon containers such as rinsed milk cartons. Freeze until firm.

Two hours before serving, set carton out to thaw at room temperature. Place blocks in punch bowl, break apart with fork and add 1 quart soda pop for each half-gallon of base.