There is an interesting thread over on the forum asking about a water filter for a bug out bag.
Some of the suggestions include:
Katadyn Hiker (and Hiker Pro)
Sawyer filters and purifiers
Sawyer Inline Water Filter
In this video we talk about the Katadyn vario from Prepared.pro.
Katadyn vario specs from the prepared.pro website:
*The Vario combines ceramic and pleated technology, and is adjustable for different field conditions
* Dual Piston technology means it offers the most efficient, fastest flow available
* The replaceable Carbon Core keeps water tasting fresh
* The Multi-Water Adaptor Base allows for the the easiest to fill water container/ bladder out there Specs
* Microfiltration Method: The cleanable ceramic disc lengthens the life of the primary pleated microfilter.
* The 0.3 micron high surface area pleated glassfiber microfilter removes waterborne bacteria and cysts. * The replaceable carbon core reduces chemicals, pesticides, and bad taste in water.
* Output: Up to 2 quarts (2 liters) per minute. * Cartridge Capacity: Up to 500 gallons (1875 liters), depending on water quality.
* Weight: 15 oz.
* Height: 6.5″
* Hose Length: 36″
The Katadyn Hiker is an economy line water filter. Its cheap (but not cheaply made), compact and durable. One of the drawbacks, the filter is a little picky about the amount of dirt that it can tolerate.
Over the past few years the only kind of design that I have used is the PUR and Katadyn Hiker. My next filter purchase is probably going to be something made by MSR. MSR seems to have a solid fan base and a good reputation. So I am going to have to take the plunge and see what everyone is talking about.