Renovo Trio - 3 Stage Water Filter & Purifier Straw - Hollow Fiber (UF) Membrane with Activated Carbon (Charcoal) Filter and Sediment Pre-Filter Unique 3 stage filtration removes bacteria (salmonella, e-coli, cholera), protozoa (giardia, cryptosporidium), metals (lead, mercury, cadmium), chemicals (oil, chlorine, pesticides) Industry leading ultra-filtration hollow fiber membrane filters down to 0.05 microns Highly versatile design works as a straw filter, screwed to the top of a bottle (generic soda or water bottle), or in-line with a hydration reservoir (CamelBak) Long filter life of 1,000 liters or more with the ability to change individual filter elements for indefinite use Lightweight and compact: 7 x 1.4 inches and 3.5 ounces