So ive been on a preparedness kick. Been looking at different things. Including emergency food and what not. Then I happened upon this gem. Capable of filtering 20000L ~ 5300 gallons of water for ~$400.00. Do the math and even having this around instead of buying bottled water is smart. This allows you to filter water anywhere including contaminated sources and filter to drinking specs. Pretty incredible if you ask me. I may buy one this week.