Prepare the red gelatin layer: In a mixing bowl, dissolve 1 cup of red gelatin in 1 cup of boiling water. Stir until fully dissolved, then add 1/2 cup cold water and 1/2 cup vodka. Mix thoroughly.

Pour the red gelatin mixture evenly into shot glasses or small cups, filling each about one-third of the way. Refrigerate for 1-2 hours, or until fully set.

Prepare the white gelatin layer: In a separate mixing bowl, dissolve 1 cup of unflavored gelatin in 1 cup of boiling water. Stir until fully dissolved, then add 1/2 cup cold water and 1/2 cup vodka. Mix thoroughly.

Once the red layer is set, carefully pour the white gelatin mixture on top of the red layer, filling each glass or cup another one-third of the way. Refrigerate for 1-2 hours, or until fully set.

Prepare the blue gelatin layer: In a clean mixing bowl, dissolve 1 cup of blue gelatin in 1 cup of boiling water. Stir until fully dissolved, then add 1/2 cup cold water and 1/2 cup vodka. Mix thoroughly.

Once the white layer is set, carefully pour the blue gelatin mixture on top of the white layer, filling each glass or cup to the top. Refrigerate for 1-2 hours, or until fully set.

Optional: Garnish the jello shots with whipped cream and fresh berries for added flair before serving.