Hangovers are typically caused by dehydration. [he says slowly, enunciating his words and waggling his finger.] Drinking a sufficient amount of water should... do the thing that keeps them from happening.

[Nodding to himself, he takes Sora's hand, partially to help stabilize him, and partially to start dragging him back towards the picnic area. After a few feet, he stops] We should also probably have a snack.