If one comes to own a kiddush cup that is well under a reviis, is there a way the cup can be used for a mitzvah and not be left in a closet forever? What can be done with a kiddush cup that is too small? Because it was intended for a mitzvah I'd rather use it for a mitzvah if there is such an option. The cup in question has a capacity of 50ml, which is less than 2 fl. oz. and certainly much less that the minimum shiur for kiddush according to all shitot I know.
In addition to msh210's ideas, these would be appropriate esp. if the cup is silver (or gold!):
- Leaving inheritance for your kids is a mitzvah. So let the cup sit around for them.
- You can either sell it and donate the money to a tzedaka or donate the cup itself to an org. (Hey! How about "Yiddishe Cups"?)
Because it was intended for a mitzvah I'd rather use it for a mitzvah if there is such an option.
I've never heard of such a thing, as far as I recall. I've heard that it's nice to reuse something for a mitzva if it was used for a mitzva, but not if it was merely intended for such use.
But no matter: that's what you want, that's what I'll address.
Here are some things you can do with a small cup (some of which are merely nice things to do rather than true mitzvos):
- Use it to partake of someone's kos shel b'racha.
- Rework it into something else that can be used for a mitzva purpose. (E.g., if it's metal, make it an izmel.)
- Use it as a sudar or as shave kesef for various kinyanim that are mitzvos (e.g. kidushin).
- Stuff it, bottom first, into your mouth when you find yourself about to say lashon hara.
- Give it as a prize for Chanuka.