How long does the filter last?

The rated capacity is 1000 liters, but real life depends on water turbidity and how well you backflush and maintain the membrane. Cloudy or silty water clogs it faster.

Does it remove viruses?

No. The 0.2-micron membrane catches bacteria, parasites and microplastics, but viruses are smaller and pass through. Use chemical treatment or boiling where viruses are a risk.

Can I use it with a water bottle?

Yes, the straw end fits large-mouth bottles. There is no squeeze bag or inline adapter in the box, so you drink directly or push it into a wide bottle mouth.

Backflush the membrane with clean water after each trip and let it dry before storage. The manual covers proper use and maintenance; there is no indicator to tell you when to replace it.

Is it good for hiking and emergencies?

It is a solid lightweight backup at 46 g with unlimited shelf life. For group trips or heavy daily use, a pump or gravity filter with a bag is more practical.

Where is the Personal Water Filter cheapest?

At Leacock Coleman Center, for $19.95, 18% under what the other stores charge, as of our latest check.

Where can I buy the Personal Water Filter?

13 stores we checked sell it, including lenonlures.com, www.preparedirect.com, MTR Superstore, Leacock Coleman Center, Mountain Skies Astronomical Society.