Zojirushi' s stainless steel vacuum insulation mug come with a removable stopper and are designed to drink directly out of the mug. They work like a regular mug, but will keep your beverage hot and cold for as long as 6 hours. They are light weight and durable. The compact design takes minimal space while maximizing capacity. Each flip lid is tightly fitted for excellent heat retention and features a safety lock to prevent accidental opening. Durable and sanitary, these mugs have a stainless steel interior with non stick coating for easy clean up. The vacuum insulation provides excellent heat and cold retention and prevents messy outside condensation. It features easy-to-clean nonstick interior, 2-inch wide opening and tight fitted lid to keep contents hotter or colder. Available in two sizes and a variety of colors. Stainless steel vacuum insulation keeps beverages hot or cold for hours, wide mouth and easy-to-clean nonstick interior, tight fitted lid keeps beverages hotter or colder than travel mugs, designed to drink directly out of the mug, Secret compartment on lid for teabags, wide mouth accommodates full-size ice cubes, interior nonstick coating makes the mug easy-to-clean. About the brand: Zojirushi (pronounced ‘zoh-jee-roo-shee’) began in Japan in 1918 as a manufacturer of hand-blown glass vacuum bottles. Today, Zojirushi' s product line extends to high-end small appliances such as rice cookers, bread makers and coffee makers, high quality vacuum insulated products like vacuum bottles, lunch jars and carafes, commercial restaurant and coffee equipment. In the past few years, Zojirushi has enhanced the focus on design and how appliances fit into everyday lives with the introduction of a variety of new products. The name Zojirushi means “Elephant brand” in Japanese.