Grath willingly offers some coffee to Delphi. "No chocolate, do not know what that is. But coffee Grath has for little Delphi."
If she has a mug, cup, or bowl, he pours some in. If she does not, he walks over to his pack and pulls a bowl out, pours some coffee into it, and hands it to her. He seems bemused by the stimulated halfling, and unconcerned that she might get over-active.
"Grath got a taste of coffee through Empire traders coming through town. Grath really likes coffee."
(Note, he probably has enough for two more people. Coffee pot item description is a little unclear, so grab some while you have a chance.)