1 (6 oz.) or 2 (3 oz.) pkg. sugar free gelatin, any flavor or color
2 c. hot water
2 c. cold water
1 (12 oz.) frozen lemonade concentrate
1 1/2 c. unsweetened pineapple juice
48 oz. diet lemon-lime carbonate beverage

Put in a 2 quart container. Pour boiling water over gelatin. Stir until dissolved. Add cold water, lemonade and pineapple juice. Freeze until firm. Remove from freezer and pour diet soda over it. Stir to form slush. Serves 20 (6 ounce each).