How do I get the object when cycling through a family.

I've just noticed that I can't add a container to my family, so I need to add the container to the object itself. When cycling through the family of objects, I therefore need to have a pointer to the object so that I can get the other object in the container. Any solutions?

EDIT : Sorry, already realised myself that I can do object UID = family.UID to get the object. Not sure if that's going to be a performance issue when looping through all of the family but I doubt it.