01 - In a medium mixing bowl, combine red gelatin with 1 cup boiling water, stirring until fully dissolved. Add 1/2 cup cold water and mix well. Evenly portion the liquid into 8 small clear cups. Chill in the refrigerator for at least 1 hour or until set.
02 - In a separate bowl, whisk instant vanilla pudding mix with 1 1/4 cups cold milk until smooth and thickened, about 2 minutes. Gently fold in 1 cup whipped topping. When the red gelatin layer is firm, spoon the white pudding mixture evenly over the red layer. Refrigerate for 30 minutes.
03 - In a clean bowl, dissolve berry blue gelatin in 1 cup boiling water, stirring thoroughly. Incorporate 1/2 cup cold water. Once the white layer has set, gently spoon or pour the blue gelatin mixture over the white layer in each cup.
04 - Refrigerate the assembled cups for an additional 2 to 3 hours, ensuring all layers are fully set before serving.
05 - Immediately before serving, top each cup with additional whipped topping, fresh berries, and sprinkles as desired.