The cornerstone hinges on technology associated more with military forces - or spies - than soft drinks. Grand prize cans contain a GPS chip and antenna, a Subscriber Identity Module card that enables the can to act as a cell phone, a speaker, microphone and a panel with a keypad.
One would be tempted to express a bit of doubt about article author's grasp of technology.... Besides, I have never seen a hinged cornerstone.
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Dragi "Bonzi" Raos Q#5196 MkII #080000376, 18GB green MkIIa #040103247, 60GB blue