Limeade Slush

Ingredients
1 (12 oz) can frozen limeade concentrate
2 C sugar
7 cans of water
2 liter bottle of lemon lime soda (7Up or Sprite)

Directions
Mix first three ingredients until sugar has dissolved. Freeze for at least 2 to 3 days before serving. When you are ready to serve, partially thaw and put into a punch bowl. Pour soda over it. Break up lumps with a potato masher.