Backhills WaterStraw - Personal Water Filter, Perfect for Emergencies, hikers, campers, outdoor enthusiast - This is truly a Life Straw - 100% SATISFACTION GUARANTEE Removes minimum 99.99% of waterborne bacteria Removes minimum 99.99% of waterborne protozoan parasites Filters up to 1000 liters of contaminated water Easy to store and reuse - Perfect for camping, survival and Emergencies Very high flow rate, uses no batteries & has no moving parts