Filtered water is just a sip away…even in the wild! The Clear Flow Water Bottle and Filter Combo from our friends at HydroBlu will be an essential item on your next camping trip, backcountry trek, hiking adventure, or any time water quality may be in question. The key is a 2-stage filter that connects directly to the sipping spout of the bottle. First, a hollow fiber membrane with a 0.1 micron pore size removes bacteria, E. coli, protozoan cysts, and parasites. Second, an activated charcoal filter removes 99.999% of all chemicals, chlorine, sediment, and heavy metals. The filter has an indefinite shelf life while sealed in its packaging, and once the activated charcoal is exposed to air it has a 1 year shelf life with filtration of about 400 gallons. For clean, safe, great-tasting water, try the HydroBlu Clear Flow Water Bottle and Filter Combo!