WaterBasics Filtered Water Bottle GRN line bacteria filter Filters up to 80 gallons Perfect for camping, hiking, survival, 72hr. Kits, RV's, and travel GRN Line Biological Protection removes bacteria, and protozoan cysts such as Cryptosporidium and Giardia Reduces chlorine and chemicals. Improves water taste, odor, and clarity Accepts any WaterBasics Series I or Series II replacement filter Patented Bite Me valve prevents leaks and is natural to use. Dust cover protects valve from contamination Finger Ring for easy transport and connection to packs