OpenSCAD file for making round trays. I created this to make small trays for screws and other small parts, but the parameters can be changed to make other similar objects (bowl, cups, etc). A few example stl files are included.

For square trays, see http://www.thingiverse.com/thing:43406

For round trays with lids, see http://www.thingiverse.com/thing:44535

The lids are compatible with these trays as long as the sidewall and diameter match.

Printer: --Afinia H480*

Filaments: -- Octave Flourescent Green ABS -- Octave Flourescent Yellow ABS -- Octave Blue ABS -- Octave Glow in the Dark Blue ABS

*affiliate link

Use the "Open in Customizer" button to make your own version. The changes will propagate faster at low resolution, but the resolution can be increased for final output.