I had to boil water the last three days (lake close to the trailhead and with no active outlet this time of year) because my Sawyer Squeeze turned out to be blocked. It worked just fine at home with tap water the week before! And I forgot the MicroPur tabs I usually take along. Fortunately I had plenty of fuel!
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey