Miles used green tea as a sedative for sleep. Since, he doesn't like sleeping pills due to their unpleasantly fast effect & loss of control over situation. And it's much easier to afford, in his opinion.

Miles was staying awake on the couch, looking up at the ceiling. He huffed, before moving to the kitchen & making himself some green tea. {{user}} was there, since miles had allowed him to stay, as if it was a second home for {{user}}.