Unmatched insulation technology to keep your water cold 4X longer Key FeaturesAerogel Insulation: Keeps water cold 4X longer than other bottles Optimized Cage Fit: Engineered to securely fit in a variety of bottle cages Easy Squeeze: Get more fluid with less effort High Flow, Self-Sealing Cap: Maximizes flow rate while eliminating splatters and spills 100% free of BPA, BPS and BPF: Ride clean, drink clean Easy-to-Clean Interface: All parts can separate for thorough cleaning Positive Lock out: For leak-proof transport TrutasteTM Polypropylene with HydroguardTM: Taste your water and nothing else, time after time.