UPDATE: IT WORKS! (kind of). I redesigned it with a little rotating wiper that helps push the coffee through the sieve. I would still like to improve the usability. This is for sieving your espresso grinds into the portafilter of your espresso machine. I've pre-made an stl that fits in a 58mm portafilter (most machines). I will post an update when I have tested it. The .scad file is just a mix up of mesh http://www.thingiverse.com/thing:27805 and funnel http://www.thingiverse.com/thing:49597 So yeah, get rid of those ugly clumps and perfect your shot of espresso! http://youtu.be/Tb4iAySdqVY