24 red grapes
24 white seedless grapes
1 bottle (40 oz.) white grape juice, well chilled
1 bottle (25.4 oz.) sparkling white grape juice, such as Catawba, well chilled
1 liter (33.8 oz.) sparkling water or seltzer, well chilled

Place grapes in a single layer in a metal pan. Freeze overnight. Just before serving, combine juices and sparkling water in large chilled bowl. Add frozen grapes. Makes twelve 8 ounce servings. 130 calories each.