Place the unflavored gelatin in a small bowl and add about 2 tablespoons of cool water. Let it sit for approximately 5 minutes to bloom.
Heat 1/2 cup of water or unsweetened herbal tea until hot but not vigorously boiling.
Add the bloomed gelatin to the hot liquid. Whisk thoroughly until the gelatin has completely dissolved and no visible granules remain.
Stir in the unsweetened cranberry or pomegranate juice until the mixture develops an even pink color.
Add lemon juice, a small pinch of pink salt, or your preferred low-calorie sweetener if desired. Taste and adjust before chilling.
Pour the mixture into a small glass, serving cup, or silicone molds.
Refrigerate for about 2 hours, or until completely set.
Serve chilled in the cup or remove the gelatin from the molds and cut it into bite-sized cubes.