Recommended to me was this product that claims to preserve water for 5 years. http://www.thereadystore.com/water-storage/water-preserver It apparently works via killing off any bacteria in your stored water. My question is, doesn't bleach work exactly the same way? If you put clean tap water in a sealed container, and you "nuke" everything that's potentially in it with the appropriate dose of bleach (8-16 drops per gallon) and then keep it sealed up, wouldn't that take care of the bacteria problem also? How could this "water preserver" work any differently that plain ol bleach? Notice the shelf life of the product itself is 6-12 months, so the product is clearly not continually "cleaning" your water over 5 years. I assume it's relying on the initial "cleaning" and then being in a sealed container where no additional contamination may enter. So...who's to say that bleached water in a sealed container wouldn't last 5 years also? (IIRC, the commonly recommended injunction to "rotate your water every 6 months" is for plain old tap water, not tap water that you've bleached.) Finally: what is it that makes water "go bad" eventually? If it's merely bacteria creeping in somehow, why couldn't you continually re-treat the same stored water with bleach every year for a decade or more? The bleach merely breaks down into water and a little salt over time; the bleach acts, and then it's gone. Or is there something in water that actually "goes bad"? What would it be? They hydrogen goes bad? The oxygen goes bad?