The fastest way to start water storage (if you think you can trust your supply), after every gallon of milk you drink, thoroughly clean the plastic container and refill with water. Place the cap back on and shrink wrap it. Not a lot but until one can save the money to purchase mega-gallon storage facilities, one person could safely store at the rate of one gallon per week. This particular amount will at least help that one person with water rations.
Offered by Brian.
Water in a plastic container has a shelf life of 6 months. It is virtually impossible to prevent bacteria growth in water placed in a plastic container. This information comes from a food technologist. You should add chlorine to it prior to drinking if it's longer than 6 months. Your stomach will thank you.
Offered by John.
Water in a plastic container will have an indefinite shelf life if you prevent bacteria, etc from growing in it. Keeping it covered and cool will do it most of the time, but adding a little colloidal silver is cheap , fast, and very effective.
Offered by Ed
The big problem with this type of plastic container is that it probably won't last the G-force of a pole shift unless uniformly supported on all sides. As far as bacteria are concerned, being passed in front of an ultraviolet light will kills bacteria. There are other methods just as effective.
Offered by Mike.