eek in Missoula. The temp was below freezing, i'de say 20-30°F, or somewhere around there. I chipped through an ice shelf on the creek and dunked the bag into the ice cold water. Filling it was easy with the current but I can see some wishing it came with a bigger bag because it doesn't look like much when the bag is filled. I use a 32oz Platypus bag I have, and carry the included 16oz bag as a backup! Anyway, I screwed the filter onto the bag, tipped it upside down and water came out with a very effortless squeeze. After I got done laughing about how simple this was, I gave my boy Yoshi a drink as well (my English Bulldog). He also took to it well, as he's a big fan of drinking from water bottles anyway. So yeah, this is a dog friendly design!

Also out of curiosity I affixed the straw directly to the filter and drank directly from the creek and it was quite easy to do. The amount of suction required was similar to drinking a milkshake, and the flow rate was surprisingly great. At that point one can either shake the filter free of the water still inside the filter, and/or blow through it providing the same effect. (I should note that if using this in freezing temperatures, to prevent the filter from freezing after use, you will want to keep it on or near your body's core).

When I got home I did the back flush with the syringe twice, and the thing flushed perfectly. This thing was a piece of cake to use, and was exactly what I was looking for to carry in my Heli Pack. I would recommend this filter to anyone!...and for $20, you cannot beat this. Plus you get a bag, straw, and syringe with it. Buy one now!

Anyone with questions, feel free to ask/comment. Glad to help.

UPDATE: After 18 months of steady use, this thing is still running strong! I have also come up with a cool addition to this water filter...I removed the sticker on the white middle section and I have replaced it with about 5 feet of standard width 1.88" DUCT TAPE! Using the filter AS the spool for the tape, allowing this filter to be a multi-purpose device. Some people will carry duct tape with them as a emergency repair kit, but we all know duct tape has a million uses, it's the cousin of paracord practically. Trust me it is cool, with the duct tape wrapped around it multiple times, the tape will eventually be flush with the filter end caps and not look sloppy at all. Plus it's a cool way to personalize your filter with a color or pattern to match your kit. If your a little picky like me, I didn't exactly want a "blue" item with my stealth gear. Anyway, this method allows you to carry a decent amount of duct tape spooled around an item you are already carrying, and not taking up ANY extra space than the filter already is using inside your kit.

Why not carry some...it might come in handy sometime.

所以首先，让我说我用我的主账号订购了这款产品，并且免去了为期2天的运费...它在1天就到了。我立即把它拿出来，与小狗进行了一天的徒步旅行测试。

在米苏拉的响尾蛇溪，我们利用它成功进行了冷冻。温度低于冰点，20-30°F上下。我穿过小溪上的一个冰架，把袋子塞进冰冷的水中。目前填充它很容易，但我希望可以看到一些它带来一个更大的袋子，因为袋子满的时候看起来不是很多。我使用一个32oz的Platypus包，并携带包含的16盎司袋作为备份！我把过滤器拧到袋子上，把它颠倒倒过来，水很容易地挤出来。在我完成这个简单的操作后，我给我的男孩Yoshi喝了一杯（我的英文牛头犬）。它感觉还不错，因为他很喜欢喝大瓶的水。所以说这对于狗狗来说是很好的设计！ 

出于好奇，我把吸管直接放在过滤器上，直接从溪里喝，这很简单。所需的吸力量与喝奶昔相似，流量惊人地很大。在这一点上，人们可以摇动过滤器中没有水的过滤器/或吹过滤器，可以达到相同的效果。 （我应该注意，如果在冻结温度下使用这种方法，为了防止过滤器在使用后冻结，您需要将其保持在身体的核心附近）。 

当我回到家时，我用注射器反复冲洗两次，完全冲洗干净。操作简单，正是我正在寻找的便于携带的产品。我会推荐这个过滤器给任何人！ 20美元，物有所值。此外，您还可以使用袋子，吸管和注射器。立即购买吧！

任何人有问题，随时可以问/评论。乐意效劳。

更新：经过18个月的稳定使用，这款产品依然很棒！我还想出了一个很酷的办法，除了这个水过滤器...我删除了白色中间部分的标签，我已经更换了约5英尺的标准宽度1.88“DUCT TAPE！使用过滤器作为线轴为磁带，这个过滤器是一个多功能的设备，有些人会带胶带作为紧急维修套件，但我们都知道胶带用途广泛，这和paracord相似，胶带最后几乎会与过滤器端盖齐平，并且看起来并马虎一般，而且您可以使用颜色或图案对您的过滤器进行个性化设置，以配合您的套件，如果您像我一样有点挑剔，我并没有完全想要一个带有隐形装置的“蓝色”物件，无论如何，这种方法可以让你携带一些体积或大或小的胶带，除了你已经携带的物品，而您的套件中已经使用了一些超过过滤器的额外空间。 

为什么不携带这款产品呢...它可能会在某个时候派上用场。

yptosporidium. We used a 2 liter bottle as a dirty water bottle and found it to be easy but slightly time consuming to squeeze fill our respective Water bottles but still way better than carrying water in. Careful freezing destroys membrane of filter not for sub freezing temperatures. Bought this brand filter over others because of its versatility to use with straw or any soda bottle and it's long life of 100,000 gallons. Check out images of the product I uploaded.
EDIT After 1 year: This filter is still working great after over a dozen backpacking trips using this filter and several hikes. It is truly very nice feeling to drink the water right out of the river or lake your camping next to vs carrying in bottled water. Have used the the syringe to clean it several times and does seem to keep the flow going fast enough. I use a filtered funnel to scoop water up and into my soda bottle before filtering to keep filter as particle free as possible. I tried to use a platypus bottle bag with this filter but it does not fit quite and leaks, 2 liter bottle works best for us. Still totally satisfied wil buy another when it plugs up.

我用这个Sawyer过滤器为我的妻子和我在野外野营旅行中提供饮用水。过滤器很小，性能很好。我们注意到没有什么奇怪的水或它的味道。我们正在使用的干净的水可能包含“海狸发烧”和隐孢子虫。我们使用了一个2升的瓶子作为一个脏水瓶，发现它是容易的，但是挤压我们各自的水瓶稍稍有些费时，但仍然比携带水更好。小心的冷冻破坏过滤膜不是亚冷冻温度。买了这个品牌过滤器，因为它的多功能性使用秸秆或任何苏打水瓶，它的使用寿命长达10万加仑。可以查看参考我上传的产品的图像。

编辑1年后：在使用此过滤器多次远足超过十几次背包旅行后仍然工作的很好。直接喝流出河流或湖泊的水是非常好的感觉，可以媲美您的野营旁边携带瓶装水。使用注射器清洗好几次，似乎使流量保持足够快。过滤之前，我使用过滤漏斗将水舀入我的汽水瓶中，以保持过滤器尽可能无颗粒。我试图用这个过滤器使用鸭嘴兽瓶袋装过滤器，但它不会泄漏，2升瓶子最适合我们。当它堵塞时会再次购买，仍然完全满意。

ter through it. This filter cleans anything from questionable garden hose water to murky lake water into perfectly clear and crisp to the taste drinking water. At first, I was skeptical of course. Who would think that you can turn brown, dirty water into clean, perfectly safe water with just such a small, affordable filter? But rest assured, this filter is a powerhouse and continues to go above and beyond.

One tip I have for easier and more bulk filtration is to pick up a Platypus Plastic 2L Water Bag (Link below). It's less than $10 just like the bottle you get with the filter except it allows you to filter 70oz rather than 16oz. I also got a grommet kit from a local craft store and placed 2 grommets in the corner of the bag in the seam. I then ran a 1 foot section of para-cord through the grommets which allowed me to hang the bottle on a tree branch or any other convenient location. This way you can let gravity do the work and continue on with your camp chores. I was able to filter 2 liters of water this way in around 10 minutes.

One word of caution: Sawyer claims that you can filter 1,000,000 gallons of water through this filter (you're probably more likely to lose the filter before you get to that point) regardless, cleaning is a must. It will greatly extend the life and quality of your filter and water. After every filtration session I recommend flushing the filter with clean water using he provided syringe. Don't be afraid to really shoot the water in there, you're only helping your filter.

All in all this filter was a GREAT buy. I don't think you can find a better filter, especially one under the $100 mark!

http://www.amazon.com/Platypus-Platy-Bottle/dp/B002NZS142

the straw of your CAMELBAK this water filter fits perfectly (I've attached pictures).