Waterdrop Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 0.1 Micron, 5 Stage Filtration, Blue

This is a great water filtration system for camping. For those who are used to pumping to get clean water, this will be a pleasant revelation. For those who have used other gravity feed systems this will be an inexpensive and surprisingly quick alternative. I recently used this on a 4 day backpacking trip and love it. Here are a few highlights:1. The feed back is lightweight, flexible, and fills to 1.5 gallons in one scoop of lake water. (BTW, don't fill it all the way to 1.5 gallons--it'll work better at about 1.25 gallons.) My friend is going to purchase the bag simply because it's so much easier and more efficient than the bag his (very expensive) system came with.2. The filter has a bigger barrel than my Sawyer, and thus flows at about twice the speed.3. The filter can be back flushed with the provided collapsible bottle--no need to bring along a syringe for back flushing.4. The hanging system (also provided) is high quality and works great.Here's what I don't know:1. My friend and I suffered no symptoms of waterborne illness, but the flow rate was so strong when we first started using the system that I was worried that it might not be filtering. What can I say? I guess I'm suspicious because it worked so well! The flow rate did decrease on the 4th day (after filtering about 11 gallons of water). But even the reduced rate was similar to my Sawyer filter.2. The instructions didn't say anything about back flushing. I went ahead and back flushed when I got home, since every other filter I've used makes some provision for cleaning/flushing. I don't think it damaged it, but don't know for sure. I'd love someone from the company to respond to that question.

A great item to use on the good, hasn’t had any problems or leakage the size of the bag is big as well. Also great functionality of consistently filtering the water well. There are also couple ways to use the bag and filter which is great; read the instructions.

This works great and I recommend it. Easy to use. I took it with me for a 3-week trip to Argentina and used it to filter the water so I was not wasting money on buying bottled water.

Great filter purchased for extended wilderness camping trip that functioned as needed. Only reason for not getting 5 stars was how quickly the filter on it seemed to silt up and slow down. The creek where we filled up with was a clear high mountain stream and we were careful not to muddy the water as we filled the bag so it’s not like there was a heavy amount of silt needing to be filtered out. I’m sure if we were using it in a muddier faster moving river like the Colorado or something the filter would have been even harder to use. In the long run, my family of four got all our drinking water for the majority of our trip through this filter and no one got sick which is the main thing. The fact that it got slow and harder to use I was a slight in convenience but, in the long run and acceptable issue given its functionality.

Pros1) next best thing to having a portable tap in the forest.2) Gravity fed purification process is much better than squeezing a plastic bag.3) holds a sizeable amount of water which reduces trips to the river.4) compact and lightweight when hiking. Especially given the functionality it brings.5) feels very durable and works well no hiccups so far.Cons1) if the river is low on water involves a bit of strategy to get water in the bag.2) the tap on the hose squeezes the hose itself it’s not an issue now but it may lead to a leaks after many uses.In summary.Very happy with this purchase this is going to be a mandatory item on any hike I go on in future.

Works great and very durable, water does escape the top when rolled, so not great for transporting water

Went on a three day backpacking trip. The lake was frozen over but one of my friends managed to crack it open. I just dipped the bag and brought it up and we filled a 5 gallon bucket with a couple trips. Everyone loved this. It was very easy compared to some of the other ones others had. I would highly recommend this And it’s versatile too.

I'm not very happy with this purchase. Sure, it's cheaper than most gravity filters, but there are some drawbacks.The filter/straw does not provide a way to connect and drain into either a hose or a water bottle. You have to hold it. In other words, if you want to hang the whole contraption from a tree, you have the dirty resevoir connected to the hose, connected to the filter, connected to nothing. If you wanted a resevoir for clean water, you would have to stand there and fill the container.Second issue: the hose connects to other pieces (up and down stream) using pressure fittings, and the pieces will eventually slide off. If you hang the whole contraption, you have gravity actively pulling the filter off the hose. Not ideal.Beyond these issues, the filter works as expected. You can screw only the filter onto the provided water bottle and suck/drink directly. That's neat, and I wish they provided similar screw fittings for other parts of the setup.