Solar Water Purifier

Please see https://www.thingiverse.com/thing:3421671 for a new version of this concept.

I explain it all here, but Brian does a much better job in this industry write-up (I am so amazed and thankful for his efforts): http://3dprint.com/15917/3d-printed-water-purification/
Since early childhood I have always wanted to "make the world a better place", a quote from my youth. Now I'm 47 years old (going on 11 lol) and I have the time and resources to do just that. Here's how.
This simple thing is designed by myself to convert a trashed 2 liter bottle into a solar water purifier. You cut the bottle into two sections (cut as shown near the bottom) and insert this 3D printed ring-like object. Then leave it in the sun all day and at the end of the day there will be some clean water in the collection tray of the object.
What makes this invention so likely to actually be used is the following fact. If you give a desperately impoverished person an object with the intention of