Oh wait - not sold out from the link you posted.

It looks really impressive.

When you combine it with a Berkey, you get a fairly comprehensive water purification system that requires zero electricity and is portable.

Filters out living things (bacteria, virus, protozoa) and inerts (chemicals, vacs, pharma) to 99.9% when combined.

For really gnarly water I'd probably boil before consuming, depending on how much time I had.

It's good to have the tools and know how.