Creamsicle Punch

1 (48 ounce) can pineapple juice
1 (6 ounce) can frozen orange juice concentrate, undiluted
1 can sweetened condensed milk
1/2 gallon pineapple sherbet
2 (2 liter) bottles 7-Up
Gallon size freezer bag

In a medium bowl, mix pineapple juice, orange juice concentrate, and sweetened condensed milk; put into a freezer bag and freeze.

When ready to serve, remove bag from freezer and thaw to slush consistency; pour into large punch bowl. Add two parts 7-Up to one part pineapple sherbet; stir gently and serve.