Hot Cocoa Dippers: Easy with marshmallows, drinking straws, chocolate and red nonpareil sprinkles! Except no one should drink hot cocoa with a straw, so I would use a candy cane. Mini ones would fit on the side of the mug!
Santa Cocoa Mix - Clear cake decorating bags filled with peppermint chips, hot chocolate mix & marshmallows. Insert a spoon dipped in chocolate for stirring then tie the bag. Glue a white pom pom, wiggle eyes, felt nose and mouth & with a cotton mustache.