Sturdy (yet sharp!) Batman Cookie Cutter

This design is a result of a friend requesting a Batman cookie cutter for use on a cake that she's working on. I printed off one of the available models here on Thingiverse, but thought that it was too flimsy. This cookie cutter utilizes a chamfered cutting edge to allow for the walls to be thick enough to be sturdy, but yet still have a relatively decent cutting edge.

As is, the model results in a 4" wide cookie - so scale appropriately.