A plastic pitcher is all you have? That doesn't sound very big...surely you have SOMETHING a bit larger? What will you do for future hatchings, especially if you have a few happening at once? You can't put them all in one pitcher!
Why not have the monarch on your finger and take a picture for your father of it on your finger? When they're still "fresh" out of the pupa, they'll hang on. Just earlier today, my mom spotted one that had come out of the pupa within an hour or so. It was hanging upside down from the pupa and fell. It was more than glad to hold on to my finger and I managed to snap a shot: