A lot of the backpacking trails north of Houston have issues with heavy metals in the water sources. I picked this up at REI. Suppose to get rid of Viruses, bacteria, cysts, chemicals and heavy metals. Its 10 oz which is heavier than my sawyer but I think I can live with it Gravl Water Purifier


Edited by toddfw2003 (12/23/16 06:08 PM)