This "experimental" halloween cookie cutter has been created with the 2d to 3d application "eXtrudy":
http://www.thingiverse.com/thing:157322
I'm not sure if the wall thickness is good enough....
The original bat image was downloaded from:
http://www.webdesignhot.com/free-vector-graphics/vector-set-of-halloween-bat-silhouette/
Extrudy_Halloween_Cookie_Cutter.stl | 12.2MB |