The box is whole! Unfortunately, because the clasps were very slightly off, they didn't work. See, they're a silly design, that simply has a dome shape on the stationary side, and a circular hole in the hinged side. Because there was slightly too much tension when they were down, it would just pop back up. In order to fix this I filed away a little bit of the material where the clasp rests, making it need to go over a thing that sticks out further to unclasp. The lesson: never make clasps that the "closed" position is not at a local potential energy minimum.