Steelbeak does eventually return with a single steaming mug of questionable content. It's tea in a very broad sense of the word. Good enough for him to drink, but he doesn't exactly have refined tastes, so it might not be up to snuff for Crane.

He sets the mug down by 'Jekyll's' side and peers over his shoulder to catch a glimpse of the research papers. "So, how're we doing? You think it'll work?"