Blackwater USA (a security training firm in the USA) has posted a document (PDF form) that shows X-Ray pictures of one of the cans from Coca- Cola's Unexpected Summer advertising campaign that involves a cell phone and GPS device in a Coke can.

You may recall some fervor (courtesy CNN) over the introduction of the cans and potential issues with shipping them to the military.

This subsequent presentation was apparently put together with cooperation from the TSA and Coca-Cola for use by security screeners.