Top positive review
So far, so good.
December 31, 2014
1. Amazon Delivery - I'm impressed with the time that took place between order and fulfilling shipment. Order placed end of day Dec 28th, received today Dec 31. Was here when I got home, and email tracking over the last 2 days has been specific & consistent. First Amazon order placed, so that exceeded the expectations.
2. Packaging - Filter was fairly lightly packaged on arrival with not piles of directions or extra garbage to get rid of - Basically three pieces of card stock paper and a plastic case to contain it. Thank you for not over-packaging - this means a lot to me.
3. Size & Weight - Impressive. Filter is roughly 3 times the size of a tube of chap-stick. It fits in the palm of my hand. It's weight is borderline negligible considering it's purpose. The plunger is absurdly large at about twice the size of the filter itself, so it seems sort of silly. However, it gets decent pressure and could also function as an irrigation syringe, making it multipurpose anyways. It's as light as the filter. The bag packs down well, but it's stiff and hard to fill up, even under a tap. Bring a ziplock to help fill it up in standing water sources.
4. Preliminary Testing - We bought these for a trip to Central America we are taking in a month, but also we wilderness guide here in Canada. In my first test I used our tap water and some neon purple food coloring belonging to our roommate. I filled the squeeze bag, added about 3 drops food coloring - enough that you could see it was purple water when you held the bag to a light, as it is somewhat opaque. The water will dribble out and it doesn't require a pile of pressure to feed it through. I probably used about as much pressure as an easy handshake and emptied the bag in less than a minute. Don't use too much pressure - the few directions on the packaging warns you could burst the bag, or damage the gaskets. What was interesting is that the water on the other end initially came out clear until you got enough of it to realize that it was actually coming out blue. What this says to me is that it filtered out the red color particles, but left the blue (it means that the red particles are larger than 0.1 micron, and the blue are small enough to get through, consistent with the product advertising, really). There were no visible floating particles in the water, to the naked eye under bright light.
Overall, I'm pretty stoked about this device. It's small, and it's obviously filtering on some microscopic level. I have no other quality filters to compare it to at the moment, but I'm satisfied that something is definitely happening through the filtration process. I'm looking forward to hooking this up to a water bladder and testing it further.
Keep in mind that this is a filter - it gets rid of larger particles in water, bacteria and protozoa. It MAY NOT be effective against VIRUSES (sorry about the caps) like Hep A, Norwalk Virus, etc. Viruses are significantly smaller than 0.1 microns and that means your water could require additional treatment to make it safe. This is not the be all, end all of water purification. It is a good start, but when in doubt, combine it with additional treatments that are effective against viruses. Generally, this means some sort of chemical addition to the water (iodine, chlorine, etc).
I may give an update after more testing and after the trip to Central America letting everyone know how it has held up. Currently not sure of how universal it is on other water bottles (definitely wont fit my glass water bottle, but I could use the straw).
Thanks for reading!