"You probably shouldn't have said it then," he chuckled, amused to no end at her reaction. It seemed like the kind of response only someone actually beginning to relax, even a little bit, would be capable of. He'd take the victory. And it wasn't as though anyone's appetite would really shock him at this point. He had his own to contend with, as it was. He didn't mind paying for one meal.
"Don't see why they don't matter here any less than at home. That's entirely up to you. I figure it depends on the circumstances, personally." He wasn't going around introducing himself as Captain America. Not that he did back home, but he didn't really have to, either. People tended to just know. But just because people didn't know him here doesn't mean he'd be content to spend his days buying coffee or training people at the gym. That felt too much like going along with the idea that they were stuck here, and he wasn't quite ready to accept that yet.
His eyebrows rose of their own accord when the witch made the cup grow in size. "That's uh...helpful," he settled on, not sure what else he could say of it. It was unlike anything he'd ever seen before, honestly. "I wonder if they could do that with the doors, for you." He turned his attention back to the witch. "I'll have the same. But, one of those," he indicated what looked to be their regular 'large' offering.