Ultraviolet light is becoming popular because it’s effective in quickly killing all microorganisms. The ultraviolet light destroys their DNA which prevents them from reproducing. Early models were expensive and didn’t work with a wide variety of water containers, but that’s all changing. The “SteriPEN Adventurer” weighs 3.6 ounces and ships with two CR123 batteries. Rechargeable batteries are also available. Nickel metal hydride batteries are recommended for cold weather use. This style or lithium disposable batteries will give you about 200 treatments. The Adventurer can purify a quart of water in 48 seconds. The cost is 9.95.”After I returned from a public health meeting yesterday with community leaders and school officials in Comal County, Heather suggested I send an update to everyone, because what we are hearing privately from the CDC and health department is so different from what you are hearing in the media. Some of you know some or maybe all of this, but i will just list what facts I know.