Slush Punch

This is a recipe from Lane's family that they always have at family gatherings.

4 cups sugar
6 cups water
46 oz can pineapple juice
3 cups orange juice
1/4 cup lemon juice
6 cans 7-up or Sprite, refriderated

Combine water and sugar in large pot, bring to a boil, stirring occasionally.  Cool and mix in juices.  Place in gallon sized ziploc bags and freeze laying bags flat.  When ready to make punch, thaw bags slightly then place in large bowl, mash with potato masher and add soda to make slushy.