ENJOY HOT COFFEE AND HOT TEA FOR HOURS; Incredible temperature retention ENTIRE INSIDE AND RIM are finished with a real ceramic coating which delivers the purest taste and prevents trapped flavors, odors or smells THE SMOOTH CERAMIC LINING IS LIGHTWEIGHT, it won't chip, it resists staining and is easy to clean The tight fitting acrylic lid allows for easy sipping of hot drinks, and is straw friendly for iced beverages; The lid will not prevent spills if the mug is knocked over It holds hot beverages up to 8 hours and cold beverages up to 14-18 hours (additional hours if ice included). Hand wash for longevity. Do not microwave, No dishwasher