The iconic Stanley Classic Stainless Steel Thermos keeps beverages hot or cold for up to 32 hours, depending on the size. It also offers stainless-steel construction and a heavy-duty handle for easy carrying.Vacuum insulation keeps drinks hot or cold for up to 32 hours depending on size18/8 stainless steel wont rustInsulated lid doubles as cupLeak proof and fully packableBPA-freeStanley Classic Vacuum Insulated BottleSizeHandleHot DurationCold Duration16 oz.No15 Hours15 Hours25 oz.No20 Hours20 Hours1.1 qt.Yes24 Hours24 Hours1.4 qt.Yes28 Hours28 Hours2 qt.Yes32 Hours32 Hours