He laughed with her, the sound infectious and the silliness of the moment taking over his usual dour demeanor. "I don't have a catch phrase," he finally said as his laughter calmed, "but I do have vodka, and you mentioned orange juice." He hoped, just now, that what she'd listed was what she had in the flat. "I'm pretty sure it's hard to mess up making a screw driver, though what kind of potionsmaster would I be if I couldn't mix a drink," he said with another smirk.