CONVENIENT TO DRINK FLIP STRAW- The Zukro insulated sport water bottle is made of 18/8 stainless steel, BPA free, non-toxic, scratch and crack proof. The heavy-duty metal water vessel nevers rusts, stain, or imparts a metallic taste. It is heavy when the water flask container is full loaded, the jug is specially built with flip straw to make drinking effortless. KEEP COLD UP TO 48 HOURS - The 1 gallon water bottle is double-walled vacuum insulated, sweat free,no condensation, it keeps your drinks cold up to 48 hours, and hot 20 hours.The large capacity one gallon water jug helps you stay maximum hydration with fresh water at perfect temperature even on the hottest day, throught all day no matter you are at gym, outdoors, on the road, or long days commuting. VERSATILE AND FUNTIONAL - With its extra wide mouth opening, the thermos water jug is easy to clean and refill. The leakproof screw lid features a built-in straw nozzle and fast-flow spout for convenient drinking or pouring, an