This Zojirushi SM-JE36-RC 0.36L Stainless Steel Mug is crafted from high-grade stainless steel for strength and durability. The double-wall insulation keeps beverages hot for up to 6 hours and cold up to 24 hours. The leak-proof lid and comfortable handle make the mug great for on-the-go. Enjoy your favorite hot or cold beverage with this stylish and practical mug.