Giardia cookie cutter

I made a Giardia cookie cutter following instruction by arpruss.
http://www.instructables.com/id/3D-Printable-Cookie-Cutters-With-Inkscape-and-Open/

Depending of the dough recipe, it's sometimes challenging to take out the cut dough from the cutter, especially from the narrow end. I apply some oil on the surface and clean out the dough, which makes the cutting a little easier.