I have one... actually I am onto my second...
I used it for only a section of a song live, so quickly whip it off and lob it aside to carry on playing, but without fail always forgot to pick it up at the end of the set, so lost it in Croydon, and it was kindly posted back to me, then lost it in Edinburgh, which I never got back.
If I lose this next one, I wont bother with a third.