Cut cantaloupes in half and make mellon balls with a mellon baller. Separate 6-10 mellon balls and refrigerate. Place mellon balls into a pitcher and fill pitcher with vodka. Chill overnight. Discard cantaloupe. Mix 1 1/2 jigger vodka and 1 1/2 jigger cantaloupe infused vodka. Shake and pour into chilled martini glasses. Garnish each martini with a mellon ball and serve.