(shakes head)
FOlks might want to do a bit more research on these items before purchase.
Iodine (Polar Pure) is a commercial product but
The European Union (EU) has announced that iodine will no longer be sold or supplied for use in disinfecting drinking water after October 25, 2009.
And
The U.S. Center for Disease Control advises against consuming iodinated water for more than a few weeks. Pregnant women, those with a history of thyroid disease, and those allergic to iodine should not drink iodinated water.
A better choice would be Calcium Hypochlorite.
See http://www.survivaltopics.com/survival/better-than-bleach-use-calcium-hypochlorite-to-disinfect-water/
As a bonus - Iodine is NOT an effective halogen when Cryptosporidium is present in the water.
Boiling is the best, even if you can get the watr to just reach a boil, it works.
Besides the site aboove, another forum Zombie Hunters (Zombie Squad) has a lot of solid information.
Just say’n.
Hyopchlorite is a very poor choice for drinking water, although it is ok for wash water.
SSKI is easy to use, and is definitely the safest, biologically. One drop will usually render a quart of water completely safe. Many people use two drops per day routinely for thyroid maintenance. Its easy to carry too, since such a small amount can last for months.