Bottle of water (or any other liquid)

[The chaser]

Off-topic: I'm more of headshots and the sniper that seems a dragunov is good for me. You know, with that one that you can scope with criticals without stopping pointing for half-second, I made 5 headshots in ten seconds with it. A scout, a heavy, a medic, and 2 pyros.

On-Topic:
Amnesia doesn't really have a lot of options with water, so I think you can forget this idea by the moment (maybe HPL3 has this).
It's a good idea, though. You would have to animate (that's the first "fuck!") but you could still have a specular map for it.