I will keep it short because after reading all the reviews in here, I must agree on the versatility of this unit. Very light and easy to use.

Great filter for the money. I've used it in some very questionable water sources in south america and never had a problem. The prefilter does a great job of keeping it clog free, and the stopper fits most nalgene bottles snug enough to let you just drop the bottle. Only problem I've had is a leaky pump valve which makes pumping even longer than usual. I don't know if it's an isolated thing or all units experience it over time, but a little duct tape seemed to do the trick.

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Iodine tabs, boiling

I got this purifier for Christmas and it has been excellent, SO FAR. It is, I believe, the lightest of the PUR purifiers and also very small for the quality. I was a little concerned when only muddy water was in sight and I was thirsty but I've felt great and you can get this one for under well under $100. Only problem is that I need more hands. One to hold the PUR, one to pump, but who is going to hold the water bottle or keep me balanced. Oh well.

I bought this filter prior to a week-long canoe trip into Giardia-infested waters. In the past, I've always used purifying tablets in combination with boiling the water prior to consumption, but how satisfying is a hot glass of water when you're completely exhausted and totally parched?! The PUR is small, light and it can fill up a 2.5 litre Camelbak in no time at all. Does it work? All I can do is let the facts speak for themselves...when a running water supply became impossible to find, I filtered and drank nasty-looking (and smelling) water from a marshy bog without feeling the slightest ill effect afterwards. I was quite concerned, without cause. The PUR carried the day without a flaw. The only problem I've encountered at all, is that the convenient water-bladder-filler-cap-thingy didn't fit my Camelbak.
If you're in the market for a filter, I recommend this one highly!

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Purifying tablets in boiled water. (nasty, nasty, nasty.)

I haven't bought one yet, but I was concerned with consuming iodine for extended periods, as I will be in India for 6 months and depending on the filter.
Note that my rating is not on the filter, as I haven't tried it yet. The rating is only on customer service.

Customer Service

I emailed PUR about my iodine concern. They responded within 2 days with the following:
Thanks for writing! Generally speaking, the iodine levels are safe for most people. There are people who have allerigies and sensitivities to iodine. Especially people who have thyroid problems or pregnant women. The output water contains about 4-5 ppm of iodine without using the Carbon Stop Top. If you run the water through the Stop Top, that level drops to 1-2 ppm which is lower than table salt or a shrimp. I would take these numbers to your physician. They are the ones who need to make health decisions for you. I hope this answers your questions!

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carrying water from camp.

A friend has had one for about 2 years. Used around Lake Michigan, several inland lakes and streams, and while on caving trips in Indiana. Never a prob. Water tasted great. Never used in REALLY bad-looking water, but never had to. May replace filter this year, just to be safe, still works like new. Pumps a high rate of water too, so you end up pumping less.

Customer Service

No need for service of any kind.

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Opening my mouth and looking up in the rain

GREAT product! really! even cleans away the ""grey or brown look"" in the water. I got a relatively bad injury, and while my friends were going back to the ranger station (about 18 miles) I used the PUR to filter some riverwater from a close-by stream, and it tasted great, and no midnight surprises later that day. ~Gus

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Simple, fast, reliable, effective. I like the way the output charcoal filter fitting mates to the various Nalgene bottles. Just be smart enough to understand that coastal/tidal rivers contain salt water farther upstream than you'd think. It won't filter that, I learned the hard way.

Customer Service

Nice feature: Hiker and Voyageur filters are interchangeable, the Hiker not offering as comprehensive protection.

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First Need Deluxe

Works very well. Easy to maintain. I filtered some very nasty looking water in an emergency once and although it tasted bad it was clean.

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I think this is the best purifier I have ever owned. It's the lightest weighing only 11 oz, and least expensive one that I can find. It pumps fast and cleanly and it hasn’t clogged yet. The fact that it will connect to a Nalgiene bottle makes it great. This is the one to get!