The Zojirushi SM-JA36/48 stainless steel mug is designed to keep your beverages hot or cold for hours. With a capacity of either 360ml or 480ml, it's perfect for taking your favorite drinks on the go. The mug features a vacuum insulation that prevents heat transfer, a leak-proof lid to avoid spills, and a wide mouth for easy filling and cleaning. It's also easy to maintain, with a simple hand-wash recommended after each use.