If your hostess is me, this is a great idea for a gift. Even if I'm NOT hosting whatever fete it is you're attending, this is still a great gift. Who doesn't like pretty glass things?
The "grooved onion," ball, swirled ball, antique finial, or mini set would all be a fab idea wrapped in a cute way, and inexpensive to boot! Which is smart thinking if you, like me, have a jam packed holiday social calendar.