This, for instance, found inside a cupboard in the hotel room I stayed at:
Hokay ... let me back up a bit: I get it. Really, I do. I've simply never seen it previously.
I suppose it's a good way to protect the salt and the pepper, keeping it fresh for others to use, all the while knowing there's no monkey business or funny stuff going on with it with come the arrival of a fresh set of people to the room.
.......... Ruprecht ( STOP )