[Sokka squints, and because it seems like a good idea at the time, shakes the bottle. ]

That's weird, why would you wash your mouth? Is it if you have something gross in it? Why not just use water?

[He abandons the mouthwash as quickly as he found it, moving off to play with some surgical implements instead. He might be making some 'prssshoo' noises.]

So, what did you want again?