Sawyer ProductsSP2101 MINI Water Filtration System, 2-Pack, Blue and Green

I'm far from an experienced long range hiker or backpacker. I'm fairly comfortable out in the woods, do about 8-9 miles a day in about 2 hours, and have common sense, but I am not a backwoodswoman (unfortunately). A conveniently-sized filter has been on my "that'd be cool" list for years, and while planning a mountain day hike with my sister I went for it with the Sawyer Mini. This was a 2,500' elevation gain hike that was expected to clock in around 9 miles round-trip, trail reports said the average run time was about 4h 45m. No problem.I'm one of those who needs to hydrate excessively- I routinely go through about 2 liters of fluid on a 9 mile route. My hydration pack takes 2 liters, so I figured I probably wouldn't even need the filter but the trip made a good excuse. I even tossed in a lightweight disposable 28 oz bottled water before leaving our car, thinking "No way is that filter getting used!"Man am I glad I had the Sawyer. My hiking partner is not anywhere near as active as I am, which resulted in hours longer on the trail than expected, and surprise, the route clocked in closer to 15 miles than 9. So we were out there, including a break at the spectacular turn around location, for about 10 hours. The Sawyer performed beautifully. I didn't have to stress about trying to conserve water, which was a real relief on the way back, now knowing how long the route actually was and how fast my partner and I were likely to move. The available watersources were mountain streams on a *heavily* trafficked trail (it was like a traffic jam in sections), so the water looked, smelled, and felt clean and cold already, but I sure wouldn't have risked drinking it unfiltered (as we saw several other groups doing- just say no to unfiltered water folks, seriously, not worth it).Okay, the actual review stuff: I'm ashamed to admit I'd never actually used a filter before, though I've seen other people do so. I'm also *not* kinesthetically intelligent. But the Sawyer mini is super easy to understand and use, lightweight, and doesn't have a lot of tiny parts or really much you can do to screw up. I did a test run when it was delivered, found it easy and obvious, and left the flushing syringe in the cabin because we were on a day hike. On the trail it was 100% slick. The included 16 oz bag for untreated water is a little small, and can be challenging to fill in still water, but performed well despite those limitations. As mentioned, the water was already very clear- no visible particulates, and I was able to filter about 1.5 liters in around 8 minutes, including the water-gathering. I assume that dirtier water with more particulates would filter slower- for the water I was filtering, the flow rate was just as fast as my tap water test run, and it was easy to speed up with some gentle pressure on the bag. I should note that I found an actual water bottle *much* easier to filter into than my hydration pack bladder with its floppy body and wide mouth (the last minute extra tossed-in bottled water was useful on two fronts!), so I'd highly recommend carrying a lightweight bottle for filtering into even if you intend to eventually drink it out of an in-line system. The filter, straw, and backflow syringe fit easily into a clean ipsy-type zip case and were light and easy to pack and carry. I will invest in some screw covers or other capping solution so as to avoid water leakage in the future after use, but this wasn't a big deal for me. I'll likely also toss in some alcohol wipes for future trips to ensure clean surfaces after the parts have been jumbled together. Overall, while I imagine that folks who actually are backwoodspeople have better, higher-volume/higher-flow filtering systems and solutions, I'm 100% satisfied with my little Sawyer mini and its totally accessible price point and feel confident it will perform when needed.

UPDATE:So I recently added the CNOC Vecto 2L bladder to this rig and got rid of my Survivor collapsible canteens. I don't think I'll be going back. The Vecto has a large opening to fill, and a 28mm bottle cap to dispense. The Mini screws on perfectly and now I can filter 2L at a time with no issues. Loving this.I also have gotten rid of all my Nalgenes from my backpacking/camping setup. I use them for the office now. I have replaced them with Smartwater bottles. The SW bottles weight less than 2 ounces each, cost $1-2 each and fit the Mini. I have also found I can get two 32 oz SW bottles into a single water bottle pocket on my pack. That means I can either carry 4 liters of water without affecting my internal storage. I have come to really value that decision. When a SW bottle wears out or breaks, I can replace it at pretty much any grocery store for less than $2.ORIGINAL REVIEW (May, 2017):Did some back country camping this past weekend and took the Sawyer Mini out with me for the first time. Reviews on it were good and I was looking for ways to cut down on weight and footprint on my old filter system (a pump). The mini is excellent.I've seen a few reviews complaining about the bag it comes with and the time it takes to squeeze "x" amount of water through it. All I have to say is, yes the bag is too small. 16 oz is kind of lame. The quality of the bag? Seems decent enough. I'll end up replacing it anyway with a pair of Survivor Filter collapsible canteens (32 oz each).As far as the filter goes, I tried it on just some regular old tap water to function test it and get familiar before taking it out. I filtered two liters of water through it (2 Nalgenes) and then back flushed it. I was shocked to see the brown much it filtered out of the tap water! I may get a second on and just screw it onto a SmartWater bottle for drinking at work!The system was easy to use. I don't know what kind of rush others are in when backpacking, but I'm not. I move at my pace and take my time. i'm not in a race when I'm backpacking or camping. I don't mind taking a couple minutes to filter some clean drinking/cooking water.The Sawyer Mini works great. I have zero complaints. I appreciate that it comes with the syringe to back flush it and keep it working well. The 16 oz bag is too small, but it works, and unless you're Hulking out on the thing, it should last just fine. That's one piece I'll upgrade, but the filter alone is well worth the cost of the set.

Fantastic product. I have used this product to filter mostly rivers and streams but I have used it with ponds and lakes without issue.Perfect for lightweight backpacking.You will need to backwash frequently to keep the flow rate but will eventually need to replace. The larger one will be better for flow rate.Drinking raw water that’s been flowing through the earth is as good as it gets for your hydration. I have multiple copies of this filter in my car and day pack.Be careful to only drink water that’s not running through cities and urban areas. Filters do not filter viruses and pharmaceuticals. In the mountains and wild areas are best. Also great to have for emergencies.