It effectively purifies freshwater sources like rivers, lakes, streams, snow, and rainwater. Do not use it for seawater, chemical runoff, or brackish water.

Unopened and kept in a cool, dry place, it maintains an impressive shelf life of three to five years, perfect for emergency preparedness.

It filters up to 4,000 litres of clear natural water. Heavily silted or turbid water may slightly reduce the total volume before cleaning.

No, filtering coloured, sugary, or acidic beverages will clog the delicate hollow-fibre membrane and significantly reduce the lifespan of the filter.

Simply backwash the straw with clean tap water after use, gently shake out excess moisture, and let it air-dry completely before storage.

Yes, the threaded end securely fits standard 28mm caliber mineral water bottles, collapsible squeeze pouches, and gravity-fed water hydration bags.

It targets biological contaminants and particulates. It cannot remove dissolved mineral salts from seawater or high concentrations of synthetic agricultural chemicals.

When water flow rate slows drastically despite thorough backwashing, the membrane pores are fully saturated, indicating that replacement is necessary.