It's about the size of a marker. It weighs almost nothing.
I keep one in my purse and I forget it's in there.
No power. No chemicals. No boiling. Nothing to wait on.
You put one end in the water and drink from the other end, like a straw. That's it. Anyone can do it.
Inside, the water passes through four layers before it reaches your mouth.
First a screen catches the sand and mud and anything you can see. Then a layer of medical-grade PP cotton pulls out the fine sediment. Then a flow layer evens out the pressure, which is what makes it easy to draw on.
My eight-year-old can use it, and so can my mother.
Then the last one does the real work. A 0.01-micron hollow fiber membrane.
That membrane removes 99.99% of bacteria and protozoa. It does not remove viruses or chemicals, and I'm coming back to that in a minute, because it matters.
But bacteria and protozoa are what put people in the hospital after a flood. E. coli. Salmonella. Giardia. Cryptosporidium. It catches microplastics too.
For comparison, other companies filter at 0.2 microns. PureFlow filters 20 times finer than that.
Now here's the part I didn't know about, and it's what actually changed things for me.
It isn't just for sipping.
You screw it onto a regular water bottle. Fill the bottle with creek water or flood water, turn it upside down, and squeeze.
Clean water comes out into whatever you're holding. A pot. A pitcher. A jug on the counter.
So you can fill containers with it, which means you can cook with it, and clean with it, and wash the kids with it.
That's a whole day handled, not just a drink. That's the thing a case of bottles could never do for me.
And one straw handles up to 1,800 gallons.
A gallon a day for all five of us, that's about a year of water out of one little straw.
It has no expiration date when you store it dry. Keep it from freezing, and let it dry out before you put it away. That's the whole maintenance list. Nothing to rotate. No date to check.
It's also made with FDA food-contact-compliant, BPA-free materials.