DetailsMazama's Backflip reservoirs are a great option to replace your current worn or grungy bladder. Designed to fit a wide range of backpacks, Backflip features an easy-to-use flip cap and Mazama’s USA-made, taste-free reservoir film. The patented flip cap makes filling simple and the locking tab assures the cap will only come open when you want it to. Backflip comes with a simple push button shut-off bite valve featuring an integrated magnet retainer. The magnet retainer puts your water close at hand while keeping the drink tube tethered to your pack in the roughest terrain. Backflip’s low-profile design keeps the bladder flat against your back. Includes a quick connect exit port for convenient bladder loading and unloading.