The only recommendation that I will make is, don't make bottle stoppers with point bits at the end (head). Bottle stoppers are inserted using the palm of the hand and most times the final seal is made by that "magical" smack at the bottle stopper head so, they should be made with a smooth surface, and will give anyone hundreds of different possible designs and shapes!
Yeah, cheap stuff has bad platings that will corrode and peal off pretty quickly after use so, chose a good quality kit and kip the design/shape" functional!:biggrin:
Cheers
George