Place your ice cube mold on a small baking sheet. If using edible glitter, lightly dust/coat the cavities of the mold with the glitter.
In a measuring cup or in a glass that is easy to pour from, combine 1 part Grenadine to 3 parts water. Mix slightly.
Carefully pour the grenadine water mixture into each of the cavities. Place a cherry OR just the cherry stem into each one of the filled cavities.
Place in the freezer until set. Store in the freezer until ready to use, then use immediately once removed.