Just a little more. Well, the fact that he was asking for a little more when he could have been asking for the entire bottle, that could mean that the moron bloke was actually going by what he needed instead of what he wanted. He took the glass and put a bit more in it, a good bit less than what he had given him the first time.
And then he made that little comment about demons and Crowley rolled those yellow eyes of his. "Please," he said, scoffing a bit as he handed the glass back to Sam. "That's a generalization. It's like saying that all demons have hooves and carry a pitchfork. Now, I don't seem to do either of those, do I?"