miniwell Gravity Water Filter Straw Ultralight Versatile Hiker Water Filter Optional Accessories. TUV Proven Emergency… Price: $39.95 (as of 04/10/2023 18:24 PST- Details)

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FILTERING MORE – Fiters up to 2000 liters of natural fresh water without using any chemicals. 2000L clean and drinkable water in the backpack on the go.
GRAVITY WORK – Take use of gravity for filtration. Threads on filter both sides. The whole filtration system can be connected inline. Set up and hang it on the tree. The filtration process is automatical without watch.