Whether it's to ward off the accumulation of funk or to maintain a separation between your hydration mix bottles and water-only bottles, Profile Design offers a replacement reservoir for the FC25 Drink System Bottle Kit. Its straw can be switched to a fore or aft position, depending on the particulars of your aero bar reach and stack, and the splash-back guard means you can refill it in the saddle with bottles mounted on your down tube, seat tube, or under your saddle.