Nathan Fire & Ice 2 Insulated Bottle 20oz Double-Walled construction keeps fluids cooler 20% longer than other insulated bottles Reflective fabric offers 360-degree reflectivity for visibility in low-light conditions Reinforced, leak-free, soft-sip; Push-pull blastvalve cap offers high fluid flow Easy-squeeze, comfort-grip allows for fast access and secure on-bike storage BPA-Free with odorless and tasteless Technology