i got 1 too!
really laughed when saw wot these posts were abt. i got one of them at the airport too. its been buggin me since, not knowin wot it does. the key idea sounds pretty good as the ball does screw off, but it would b hell of a wierd key holder! i came up with...
1) drink mixer/stirring thing (though may break the glass)
2) some kinda stress toy (not sex toy), a very wierd one
3) a bottle opener, by holding the ball&base&wrappin the wire round a bottle lid but dont think that would work.
4) something to hit ppl with
any other ideas ne1?