INGREDIENTS
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2 1-1/2 oz. pkgs. strawberry-flavored drink mix
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2 c. sugar
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4 qts. plus 3/4 c. water, divided
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6-oz. can frozen pineapple juice concentrate
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2-liter bottle lemon-lime soda
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2-liter bottle strawberry soda
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2-1/2 to 3 c. pineapple sherbet, softened