Milwaukee Tool NWT Packout Mug/Tumbler. Black Metal 890 ML, 30 ounce Insulated Tumbler. Twist to lock system that ensures a safe and practical union with other packout components. Superior Temperature retention. Keeps beverages hot or cold all day long, two wall vacuum insulation. Totally dishwasher safe. Magnetic sliding cover provides easy access and secure seal to prevent leaks. 21