The Emergency water filter straw is a mechanical filter. Nothing to charge. Nothing to plug in. Nothing to wait on.
You put one end in untreated freshwater and draw through it like a straw.
Inside, the water passes through four stages before it reaches your mouth.
A coarse screen catches sand, mud, and anything you can see, which is what keeps the fine membrane from packing up and quitting.
Medical-grade PP cotton pulls out the fine sediment, so the water comes out clear and not just safe.
A flow stabilization layer evens out the pressure, which means a six-year-old or a 70-year-old can pull water through it without giving up.
A 0.01-micron hollow fiber membrane does the real work. That's finer than the straws sold for hiking, which usually run 0.1 or 0.2 micron.
At that size it removes 99.99% of bacteria and protozoa. E. coli. Salmonella. Giardia. Cryptosporidium. Those are the ones that put people in a hospital after a flood. It blocks microplastics too.