Thanks for the link, Shoonra. But I kinda missed the "limitations" and "better solutions"...
If anything, the two most common complaints were (1) the filter housing is made of plastic, and (2) the bag was terrible. The first problem is all hypothetical. And the guy that started talking about that admits he has one (probably more) himself. The second complaint is common, and that's why most people buy the Platypus bags at the same time. I bought some of their wine containers from Academy Sports becuase they were clearance, but my buddy has a bigger bag that can hold a couple gallons (not sure if that one's a Platypus, but I know he has at least one of those as well).
That's why I like the Sawyers better than the bottle filters. They are gravity fed. No need to exert any force, and you can filter multiple gallons while doing other "man things", like chopping wood, grilling meat, and making moonshine.
If you want to get rid of fluoride, a distillery is the best way, IMHO. There are other filters, particularly ones with aluminum or bone inside, but they are pretty limited for the purposes of "surviving"... at least IMO. This filter says it has a natural source of calcium (which I'm assuming is bone)...http://www.pureeffectfilters.com/fluors ... ridge.html
Although Activated Alumina is effective for Fluoride Removal, comprehensive testing shows that FluorSorbTM has a consistently greater fluoride removal rate (apx. 20% more) and offers additional benefits such as: Raising Alkaline pH, and filtering some anionic (negatively charged) radioisotopes, heavy metals and chemicals.
Primary Purpose: For Effective Reduction of:
Secondary Purpose: For Effective Reduction of:
7. Heavy Metals
8. Organic Chemicals
Moral of the story is that, in Shoonra's link... you'll see the point made about the Sawyer filters that they are "the best filtration for your money" and "make great trade items". I've got a few of the Sawyer Minis for all of the above. I'm thinking about getting the Zero Point Two filter right now, because of the whole virus point. I'd much rather rid my water supply of virii than of fluoride... but that's just me.
Regardless of the filter you choose, make sure you use a pre-filter to prolong the life of the actual filter. If it were a serious situation, I'd use a handkerchief over a bucket of gravel, sand, and hopefully charcoal. Then hopefully another in-line charcoal filter. And then whichever Sawyer filter I felt necessary.
The only thing in Shoonra's link that I would possibly consider a "better solution" was the SteriPen. And it's definitely not better, but different. Would be great to use it in addition to a basic filter. Altho, again, in a survival situation... you're only gonna get 40 uses out of it [if you're lucky] before the batteries go kaput.
Sawyer filters (with pre-filters) and distilleries FTW!
As for the OKO, I've seen it before and more than likely chose against it because it doesn't last that long. I've seen a guy using the Sawyer filter to take out blue dye, which is supposedly one of the hardest things to do... removing dye coloring that has actually dissolved, as opposed to a particulate coloring. Another thing is that there are a few different Sawyer filters, so one person may be referring to the Squeeze model, which I really have no interest in, similar to the OKO. Looking for gravity-fed solutions. Much mo' easier. A distillery is definitely on my "To Buy" list, tho... for distilled water, of course!!!