This thread, because of its health importance, has garnered a lot of attention.

Recently I e-mailed SteriPen asking them if a bottle covered with Mylar reflective film would help the sterilization process. No answer yet. I think, based on direct observation, that we all know SOME UV rays pass thru Lexan & other clear plastics. Otherwise we would not see the purple light of the SteriPen's lamp. Correct?

So, reflecting that light back may help to kill bacteria & viruses "hiding" behind & within micro particles of debris. SteriPen requires swirling the water to give the UV rays a chance to kill any "hiding" microorganisms.

Any SCIENTIFIC info out there to support my "reflectivity theory"? (i.e. tests that can be replicated many times by different investigators with the same results.)

"There are no comfortable backpacks. Some are just less uncomfortable than others."