Hiwater Water Filter Straws Set of 4 NEW Emergency Survival Gear One box opened only for photos, still sealed in plastic bag. High-Quality Materials & Versatile Filtering Modes,removes 99.9999% dirty goods in water Portable & Long Life-Span Survival Gear Camping Gear Long Lifetime: The Portable Straw Filter Will Provide 4,000 Liters (1,000 Gallons) Of Clean And Safe Drinking Water With Proper Use And Maintenance 5-Stage Filtration, which will provide more safety filtration for your health Ultralight For Any Adventure and Rigorous Testing, our straw use Standard Testing Protocols Set By The Us Epa, Nsf, Astm For Water Purifiers