Scot Hampton converted the sturdy iPhone box into a handsome and effective pinhole camera, the iHole. From his build notes:
I tried to keep it simple and the only external items I used were tape, tinfoil (for the lens), a piece of foam, and a leftover screw and tightener from an old ikea desk. Oh, I also used a black washer for the cover of the lens but that was purely cosmetic. I used the cardboard lining that was on the inside of the original box to construct the film holders on the back. I even left the serial numbers intact, so if my roommate ever needed to return it he could ...I’m not switching until they work on other networks...Link
I suppose it might have been symbolic to take the first pictures of an actual iPhone, but that’s so cliche.