customizable Clip on pipe SoapBar holder

My bathroom lacks horizontal surfaces to put my soap bar on, and i'd rather avoid drilling holes in the nice wall tiles, so here is my solution : a soap bar holder that clips to the shower's water pipe.

Voronoi pattern for the bottom plate made with inkscape and converted to openscad using dnewman's "Inkscape to OpenSCAD converter v6" (http://www.thingiverse.com/thing:25036)