The gravity filter allows you to do other things during filtration, instead of pumping. No need to stand by the river to filter. You can carry the water back to camp. I agree with other reviewer about potential cross contamination during storage. Thanks to the other reviewer for the review, very detailed indeed and very accurate. I used the filter for a two-month bike trip in Namibia and Zambia, almost exclusively in clear water sources. I agree with your concerns about cross contamination during… Full review
The Lifestraw Mission gravity purifier is overall an OK performing filter, and I would probably trust it to adequately filter any water source not contaminated with chemical contaminants, radioactive material, etc. However, it is not without its flaws and quirks. Filter functionality alone, I would rate this filter 2 or 2 1/2 stars, but when its other flaws are taken into account it brings my rating of this filter down even lower. If someone asked me to describe the Lifestraw Mission in as few words… Full review
Great filtered water bottle. Very fast and easy. Would recommend to anyone. Great product, just used it on the trail last weekend. Just find the water source and fill it up, don't have to stop, unpack filter, filter water, then repack it. Full review
LifeStraw filters convert microbiologically contaminated water into safe drinking water.