Water and Sun are Wonderful!
I found an article about University of Washington students created a way to determine if drinking water is correctly sterilized for drinking. I’ve giving you a few links to read and watch. My first link is to PC World but some of their links were broken or didn’t result in what I felt made a better article. Great picture though!
I loved the quick text and VIDEO on King5.com regarding this device and the students who created it.
The official site of the invention and inventors is PotaVida.org. You can read more there.
I hope they get these produced soon. What a wonderful gift to the whole world!