This is based on http://www.thingiverse.com/thing:617052 but is fixed. The original version of this model was not watertight and therefore did not print correctly. This prints properly (the lid is a bit tight though, might rework that in the near future). Thanks to the original uploader for the source files!
Printed with 10% infill at .2mm and it came out great, the walls are a bit thin and flexible but should be protective enough.