The Sawyer All in One Filter is ideal for emergency preparedness kits and is excellent for use during hurricanes, earthquakes, flooding, boil alerts, and mission trips. The All in One Filter comes with all the parts needed so that it can be used with a Sawyer Squeeze pouch, a home faucet, and a standard five-gallon bucket. The build your own gravity system can yield up to 540 gallons of clean water per day from any fresh water source. Sawyer water filters offer the highest level of filtration on the market today due to Sawyer’s water filtration technology. Sawyer’s hollow fiber membrane water filters are comprised of U-shaped micro tubes that allow water to enter into their core through tiny micro pores while trapping bacteria and protozoa on the outside. The high volume of these tubes creates a huge surface area, which results in a very high flow rate and less cleaning.