Description of MSR Hydration Kit This easy-to-use kit converts MSR® Dromedary™ and DromLite™ bags into hands-free hydration systems. It includes our leakproof MSR Bite Valve and shutoff valve; a 42-inch (107-cm), taste-free polyethylene-lined drinking tube that resists freezing; and a custom hydration cap with 360-degree swivel elbow.