This half-gallon jug is designed to be personal hydration gear for athletes, avid outdoorsmen or anyone who needs to stay hydrated throughout the day. Just flip it up to sip, then snap it shut to close. Your water always stays clean and fresh. Stanley’s double-wall vacuum insulation also keeps it icy cold for hours. Take it where you need to go—the rugged handle and built-in fence hook provide portability and convenience.