Nathan Icon Fire and Ice Bottle with the SpeedLock Race Cap, Purple Cactus Flower/Tangerine Tango SpeedLock Race Cap securely closes for a leak-free seal anywhere, everytime Flow valve controls fluid intake for personalized sipping Extreme grip texture provides a secure bottle hold under any circumstances Double walled construction keeps fluids cooler 20% longer than other insulated bottles Integrated reflective fabric offers 360 degree reflectivity for visibility in low light conditions