Keeps your water clean and your drink cold twice as long Double-Walled Construction: Keeps water cold twice as long  Optimized Cage Fit: Engineered to securely fit in a variety of bottle cages  Easy-to-Clean Interface: All parts can separate for thorough cleaning Easy Squeeze: Get more fluid with less effort   Mud Cap: Drink water. Don\'t eat dirt. High Flow, Self-Sealing Cap: Maximizes flow rate while eliminating splatters and spills  100% free of BPA, BPS and BPF: Ride clean, drink clean  Positive Lock out: For leak-proof transport  TrutasteTM Polypropylene with HydroguardTM: Taste your water and nothing else, time after time.