If you want to get serious....
http://www.thereadystore.com/water-s...ncy-water-tank
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If you want to get serious....
http://www.thereadystore.com/water-s...ncy-water-tank
Some of their water cubes are pretty good deals. They also have long term water storage treatment additives for the storage units. Read the details on the 250 gallon unit for some ideas on how long you can store water. The great thing is you can fill these from the tap, and re-fill and treat every so often.
http://www.thereadystore.com/water-s...age-containers
Disclaimer- No afilliation or business interest in this vendor. I have bought some of the long term food supplies.