In the concluding fourth part of the car keys series on the MakerBot blog, a sturdy replacement housing for a cracked plastic keyfob is reproduced:

One half has a 2mm lip and the other has a 2mm groove – the result is a case that required channel lock pliers to shut… but isn’t coming apart any time soon. All of the sides are at least 1.5mm – which is way thicker and sturdier than the original case.

No WAY is this case cracking after a simple drop. From the EMPIRE STATE BUILDING.

This may just be my favorite 3D printer fix ever.