Insulate your beverage when you use this Seneca 16oz tumbler for on the go drinking. This tumbler is made out of a stainless steel material with copper insulation that will keep your drink hot for 8 hours or cold for 24 hours. It has a matte finish exterior coating that is free of plastic and a ceramic interior coating that helps give a non-metallic taste. There is also a ceramic lid with a silicone stopper. Hand wash only is recommended. Enjoy your morning coffee when you use this 16oz tumbler to take it with you.