It's totally improper and he knows it, but when everything is shit, even Cao Pi can see the merits of telling etiquette and manners to go fuck themselves. He's not even going to insist someone else pour his, he's already got that covered.

"Isn't it?" A slightly-forced smirk. "It seems as though the spirits have noticed my wine consumption. Part of me thinks I should take it as a sign to cut back, but this..." He taps the magic bottle. "...says otherwise."