Bottle caps are the single thing that I most often clean out of a jammed garbage disposal in our rentals.
Now it's very simple. I clean out a bottle cap, the tenant pays for my time for service call AND the replacement cost for a new garbage disposal even if the current one still seems to work.
I let them keep the old one as a gift. They only do this once.
The bottle cap in the sink thing really pisses me off.
angela