THERMONATOR Double Wall Insulated Stainless Steel Travel Tumbler- Red # OPTIMAL DOUBLE WALL INSULATION- Our icy cold drink & hot coffee tumbler is vacuum insulated to lock in temperature # READY TO SIP FOR HOURS Travel coffee mug keeps hot drinks hot for 3 to 4 hours & cold drinks cold for up to 24 hours JUST THE RIGHT SIZE Our tumbler cups come in 10, 20 and 30 ounce sizes to quench your thirst # ERGONOMIC DESIGN The tapered shape of our travel insulated cup is easy to hold & fits into cup holders # PREMIUM CONSTRUCTION and BPA FREE- Our stainless steel tumbler is crafted out of premium stainless steel that is durable and will never rust or corrode. Built to last a lifetime and we gurantee it!