Upgrade your old mug with our Mother Earth News brand insulated tumbler! No more watered-down iced tea or lukewarm coffee. The 20 oz. stainless steel tumbler features a double wall with a copper lining to keep liquid hot for 5 ½ hours and liquid cold for 24 hours. With a copper-colored base and Mother Earth News logo, this tumbler is just as distinctive as it is handy. Go easy on your wallet and the environment by ditching the plastic and styrofoam cups. Whether you’re on a hike, in the office, or just on-the-go, this tumbler will keep your drink just as fresh as when you first poured it.