I received a 2 liter bottle to make a gravity system with Sawyer Mini. The camera looks high-quality, but it doesn't leak, can stand on its own and the material feels very solid. It rolls up and you can clip the orange elastic around the lid to keep it neatly rolled up. The thread fits perfectly on the Mini for a good seal. I made two holes in the bottom of the bag to thread paracord through to hang it upside down and so far so good. You can also attach a hose or mini Sawyer straw to the other end of the filter if you want more control over where the water goes. I'll update if anything goes wrong, but it looks like it's going to be a while.
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