[ If either of them were slightly less intelligent they might be able to say something about what they want. ]

You should be good at it, actually. [ Stephen turns his own martini to water and puts it between them. ] It's molecular science. Chemistry. Change water...

[ He does the same little twist with his fingers over his glass. It turns a rich dark red. Does water have all the chemical compounds for the complex changes that must happen for it to become wine? No. Magic doesn't care. ] Into wine. And back again.

[ And in the reverse it's water again. He gestures at Tony. ] If you'd like to try.