I just leave stuff, tends to stay put. Or put it in a locker wothout taking the key. They're irritating when swimming anyway...
same here, i just shove it in a locker to put it out of view and dont bother with the key.
i just shove it under the bench...not gone missing yet...
Or tell the guy he's a dirty liar.
if it hadn't been so early and i'd been thinking straight probably would have just left it in an open locker.