For the pro's Pro, the toughest of the tough and those who demand the very best, the 1.4Qt master vacuum bottle offers extreme durability and thermal retention. The 1.0mm 18/8 stainless steel is rust-proof and naturally BPA-free while the Quadra insulation keeps drinks hot 40 hours, cold 35 hours, or iced 160 hours. Also featured is a steel-lined pour thru stopper so no plastic comes in contact with your drink. A robust steel handle comes with a molded silicone grip for comfort, and the bottle is dishwasher safe.