If these belong to Apple (big if), the assumption would be that the C will stand for “Color’ or ‘plastiC’ or ‘polyCarbonate’ or ‘China’ or ‘Cheap’ or ‘Consumer’ or something else in the same way that ‘S’ stands for speed. Theoretically, the aluminum model would be the iPhone 5S which of course would be speedier and have other upgrades.
As an example of Apple’s packaging, the 5G iPod touch looks to have a similar but thinner enclosure, right.
Update: Nowhereelse.fr has disected the image and found some irregularities, below:
Has the Onion nailed it again?