Meet the Antidote®. More than just a reservoir, the Mil Spec Antidote Reservoir redefines the ultimate delivery system for an operator’s water supply and provides maximum adaptability for changing missions or combat environments. Low-Profile baffled design Quick Link HydroLock for modularity and easy one-handed on-off water flow Quick Link exit port Big Bite Valve cover to keep Big Bite Valve clean and dirt free Insulated drink tube cover protects tube from harmful UV rays and abrasion 100% Free of BPA and BPS CamelBak® Got Your Bak Guarantee™. If we built it, we'll Bak it™ with our lifetime guarantee