Stainless steel vacuum mug with Slick Steel finish. Tight fitted lid keeps beverages hotter or colder than travel mugs. Plastic cover around the mouth of the mug for drinking comfort. Stopper disassembles for thorough cleaning. Wide mouth accommodates full-size ice cubes. Zojirushi's stainless steel vacuum insulation will keep your beverages hot or cold for hours. Each stainless steel mug has a plastic cover around the mouth and an easy to clean Slick Steel finish interior that resists corrosion and repels stains. The compact design of this mug takes minimal space while maximizing capacity.