Knead together chewy chocolate candies. When completely combined and malleable, roll candy between palms into a rope. Press rope around plastic tumbler with 3 1/4- to 3 1/2-inch diameter rim; press loose ends together to secure. Gently lift tumbler away from candy. With pastry brush, coat chocolate candy ring with a little corn syrup (you may not need all of the corn syrup). Place silver sugar in shallow dish; dip chocolate ring into sugar to coat.