Tea Cup by VizC&aacute;sa - Tea Mug 12 Ounce Double-Wall Insulated, Tea & Coffee Mug (Individual Cups) Mouth-blown using top quality very lightweight borosilicate-glass, measuring 3 by 3 by 4 holding 12 Ounces (355 mL) The eye catching double wall design creates dramatic optical illusion while preventing condensation Keeps Beverage hotter or colder longer while being safe to touch Heat resistant, top shelf Dishwasher safe (hand wash recommended); Microwave safe; Freezer safe, can be used gently with metal silverware With this purchase you are not only getting our amazing product, you also get our world class customer service! We know you will love our mugs or your money back!