The SENSO™ Ergo-Grip 16 oz Vacuum Insulated Stainless Steel Tumbler is made of 18/8 stainless steel with a powder-coated matte finish and features copper-lined double-wall insulation with a condensation-free surface. Keeps beverage hot for 4 hours and cold for 12 hours with ergonomic body grip design that makes it easy to grab and go. Lock-tight, screw-on PP lid with flip-top opening. Hand wash only. It is BPA Free and FDA certified.