Clearly the first thing he said when he found out Peter was drinking post-Narnia: "What, and you didn't invite me?" To which Peter replied: "Every time we drink together, I drink one cup and you're already under the table."

(Hurrah! I seriously have no idea if I'm being paranoid or if I've lost my mind. Or, um, both. Or neither. Who knows? It may be the least shippy Peter/Caspian ever, though; it's more Peter/Narnia.)