About the Limited

So I was wondering this awhile back but never really thought about it to much. What is the second case on this picture?

http://www.thesixthaxis.com/wp-content/uploads/2012/05/halo4le.jpg

I know the light grey case is the steel case for the game, but what is the dark grey case? The briefing packet? Or just a case for the steel case (the whole game case)?

I think it’s just another case for the game case, and the extra stuff. (Briefing packet, DLC codes, etc.)

A case to hold the case

caseception

But yeah, it holds everything together in one box.