Zojirushi SM-QHE48/60 is a premium stainless steel mug designed for keeping beverages hot or cold for extended periods. It features a vacuum insulation layer that helps maintain the temperature of your drinks without the need for external heating or cooling. The mug has a capacity of either 480ml or 600ml and comes with a leak-proof lid to prevent spills. The lid also has a safety lock to keep it securely closed when not in use. Additionally, the mug has a durable construction that is resistant to scratches and dents, making it suitable for everyday use.