HydroBlu Clear Flow Water Filter - 1,500-L Activated Carbon and Hollow Fiber Membrane Water Filter Bottle for Camping and Hiking - Survivor or Emergency Use Ideal for outdoor recreation, hiking, camping, scouting, domestic and international travel, emergency preparedness, survival use and your everyday 9-5 0.1 Micron Hollow Fiber membrane removes 99.99999% of all bacteria, such as salmonella, cholera and E.coli; removes 99.9999% of all protozoa, such as giardia and cryptosporidium Activated Charcoal removes heavy metals, iron, sulfur, negative taste and any discoloration from your water BPA free Tritan water bottle for extreme durability and no plastic taste Filters up to 1,500 liters - filter will stop flowing freely when it is time to replace so you aren't left guessing if the filter is still working