Originally Posted by
Aeroplane
The bladder is super-tough. It will not tear from being in your bag unless you are carrying sawblades, knives, or caltrops around in there.
I had one catastrophic Camelback bladder failure, about a week and a half into a backpacking trip in New Mexico. I had the bladder in my pack, but I guess one of the poles of my frame punched a hole in it. I had about 50 more miles to hike out with just my backup nalgene. It sucked.