So the holes don't go all the way thru? Then I'm going with finial, threaded on both ends so that different configurations could be screwed together or removed for the desired height and look...
If it's threaded on both ends and a solid body but has and end cap the only thing I can think of is an extension piece for something. It could make it convertible for fitting on a stand or carrying around of a mirror. The end cap would be decorative for the "carry around" time.
Maye an extension for something like opera glasses also? [8|][8|]
Look, straws, grasp them! [][]