Title: Most Expensive Water I Ever Drank
Review: I purchased this filter for backpacking, but it failed on the first trip. The filter did produce about ten liters before the check valve blew out. I thought it was just a bad unit, but another hiker in our group had the exact same unit and it also failed after about ten liters. At $6 per liter the water was good, but I am going to try a different brand next time.
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