Combine the pomegranate juice, apple cider, and grated ginger in a small saucepan over medium heat. Warm the mixture until it just begins to steam, then remove it from the heat.

Sprinkle the unflavored gelatin over the warm liquid and whisk until fully dissolved with no lumps remaining.

Let the mixture cool for five minutes, then stir in the vodka until evenly combined.

Divide the liquid among eight small shot glasses or molds. Place them in the refrigerator and chill until fully set, about four hours.