A dog whistle designed specifically for 3d printing. STL files are included here. Prusaslicer 3mf files are available on MyMiniFactory or PrusaPrinters. I noticed that many other dog whistles on sites such as Thingiverse had a tapered end close to the lanyard hole that would break off very easily when the whistle was dropped. This was the only whistle I tested that survived a 5 metre drop test on to a marble floor. Note that the weakest point on this whistle is the hole where the air comes out. No whistle that I tested survived being thrown up ~20 metres before falling onto concrete-but while all the other whistles I tested broke in multiple places this was the only one that broke into two pieces. FFF 3D Printed dog whistles do not come much stronger than this. Like this object? Don't forget to hit that like button;)