shankwrote a review of CamelBak Big Bite Valve Cover on September 21, 2013
Familiarity: I've put it through the wringer
Used while travelling in Africa for a little over a month and I am Very glad I had the Cover. You can imagine how bad the sanitary conditions were in most places.
Both while hiking and just throwing the backpack in the back of our jeep, the cover kept the mouthpiece clean and protected from scratches. My friends wished they had it.