2 pkg. (10 oz. each) frozen red raspberries in syrup, partially thawed
1 (12 oz.) can frozen lemonade concentrate, thawed
1 (46 oz.) can pineapple juice
2 (32 oz.) bottles 7-Up

Place raspberries and lemonade in blender. Process until smooth. Strain into punch bowl. Discard seeds. Stir in pineapple juice. Just before serving, slowly add 7-Up. Makes 4 1/2 quarts.