Long time reader with a first post. I bought one of these bladders but it was the 2 liter bladder and I had it in the top of my pack when I was hiking down a loose shell stone mountain side. The bladder fell out of the pack because I did not zip it shut and I stepped on it with all of my 200lbs and it made a small hole in the air chamber part of the bladder. I called their number to see if I could buy another one because I love the inline filter and ability to share with my dog. A guy named Bob answered the phone and sent me out a new complete bladder with hoses. I felt sheepish because i was my fault the bladder got punctured so I offered to pay for but he insisted on sending me a new one. Turns out that Bob is VP of Geigerrig and one of the founders. I have had the bladder for over a year now and no leaks, I am now on my second in-line filter as well. Love it!