1. Set 24 clear 2-oz cups on a rimmed tray; place tray in fridge to chill.

2. In a bowl, whisk flavored gelatin with boiling water until fully dissolved.

3. Stir in 1 cup cold water and 1 cup vodka (use 2 cups juice for non-alcoholic).

4. For firmer shots, whisk in unflavored gelatin until dissolved.

5. Divide mixture among cups, filling each about two-thirds full.

6. Chill 60–90 minutes until softly set but not firm.

7. Press a gummy eyeball into the center of each cup, pupil facing outward.

8. Use a toothpick or dropper to draw thin food-coloring veins from center outward.

9. Optional: Pour a thin layer of clear gelatin over eyeballs; chill 2–3 hours until firm.

10. Top with whipped cream just before serving and keep chilled until guests arrive.