he Cyclone Hydration Reservoir is perfectly designed to work in conjunction with your hydration pack for on-the-go sipping. It is made from odorless, tasteless flexible silicone and is BPA-free. In other words, it won't absorb the taste of your drink, which means your water will always taste fresh. The tube connects to the bladder via a simple quick-connect. The bite valve is uniquely molded and made with flexible Thermoplastic Elastomer (TPE) which allows for easier sipping. The cap easily loosens and tightens and folds out of the way. It is easy to fill this bladder in shallow sinks and completely top it off.