Stainless Steel vacuum insulated construction with superior heat and cold retention; Heat retention: 190F @ 1 hrs.; Cold retention: 45F @ 6 hrs. | | Easy to use leak-proof, gasket-free, screw-off one piece lid is easy to clean and has a handle for worry-free carrying | | Dishwasher-Safe in Non-Commercial washers, Patented rounded Sip Area for Drinking Comfort | | SlickSteel polished stainless steel interior minimizes odors and stains | | Individually Boxed in English with instructions and care in English, Korean, and Chinese | |