SENSO® Classic 17 oz Vacuum Insulated Stainless Steel Tumbler! Has 18/8 stainless steel construction with a powder-coated matte finish. The interior is copper-lined and has double-wall insulation. Perfect for on the go and fits perfectly in a car cup holder. Keeps your beverages hot for up to 4 hours and cold for up to 12 hours. Condensation-free surface. BPA Free and FDA certified.