Osprey Bite Valve Sheath x3 Outdoor Research emergency organizations and anyone needing

emergency organizations and anyone needing to drink water of questionable bacteriological quality

It discreetly secures your personal items and hydration flasks

Ultra-comfortable and cushioned

this one might just fit the bill

Osprey Bite Valve Sheath x3 Outdoor Research emergency organizations and anyone needing"Quench your thirst for satisfaction with the Osprey Bite Valve Sheath! This valve sheath will protect your bite valve from dirt and unwanted debris. Slip the sheath over the valve and feel the difference it makes no clogs or hissing just smooth, clean hydration! Think of it as a shield for your hydration needs!"