The Cortina 24 oz Vacuum Insulated Travel Mug with Cork Base is made of 18/8 stainless steel with a powder-coated matte finish and is copper-lined & double-wall insulated. Comes with plastic, push-on lid and molded color matched handle. Accent of cork at base is 30% cork & 70% TPE and bottom is 100% PP. Keeps beverages hot up to 8 hours and cold up to 12 hours. Hand wash only. Do not put in microwave or freezer. Must be ordered in exact case quantities. May ship from CA location. FDA certified.