The characters love their handbags big time. why not get a gift bag shaped like one, to put the goodies in. perhaps you could do a menu based on the characters e.g: subtle french themes for charlotte, sexy and bright for samantha, totally wacky designer theme for carrie, and natural with a little sparkle for the other one (can't for the life of me remember her name) --oh yeah miranda.
That way your clients can ask for a carrie - ha ha just a thought.
enjoy any way.