Hydrapak Reversible Hydration Bladder Reservoir, 50-Ounce Our reservoirs flip completely inside out, making it easy to clean and easy to dry The Slide Seal system creates a simple-to-use and effective closure Comes with Hydrapak Surge 45 degree angle bite valve for a perfect drinking With the push of a button, users can remove the hydration bladder reservoir from their pack while leaving the tube intact Plug-N-Play adapter allows the user to easily disconnect the tube from the reservoir and includes a big bore tubing