I recently asked questions about purification and storage myself. As one member suggested, a product you might see on REI (and Wal Mart, which has a much lower price btw) is the "Aqua Tainer"...food grade plastic container for water storage. I just bought a couple and will probably get more...check it out!

Speaking of purification, has anyone used the Potable Aqua "P A Plus"? It says it's supposed to make the purified water taste better. Does it work?