Steripen, so fresh and so clean clean!

I'm not much of a camper or a hiking adventurist, so this is new to me. Steripen has a product where you simply dip the pen into a container filled with water, 90 seconds later after some zapping with UV light, you have purified water! Suppose to be able to kill certain types of bacteria and viruses. I know many of the sterile products that we use in surgery are simply zapped with UV light at the manufacturer to make them sterile, so this makes sense.

Okay, after reading some more it sounds like Steripen has been around for 10 or more years. This is just one of their latest and greatest travel sized units.
Picture from Steripen