Saving to the circular file cabinet

There's the old joke about unwanted papers being "saved in the circular file cabinet," which, of course, meant the trash can. I just noticed that when using GMail on the iPhone, I can't delete a message like usual. Instead it gets "Archived" but it shows the picture of the trash can. Art imitating life? (This doesn't happen in other mail apps as far as I can tell, just GMail.)