I've got the secret

Continuing the theme[*] of pointless curiosity about other people's lives, today I would like to know what other people have on their keyrings. Do you have a "keyring", ie some sort of novelty object attached for the aesthetic wossnames? Do you have useful things which aren't keys? If your bunch o' keys is massively bulky, how do you carry it about?

( Mine... )

What've you got on yours?

[*] You are almost all wrong about mayonnaise, y'know.