<p>Beverages seem to float in our sleek double-walled coffee mugs, a fun effect that serves a very practical purpose. The two seamless walls of borosilicate glass create an insulating layer of air, so generous pours of coffee and tea stay piping hot and delicious – yet the cup always feels cool to the touch. The durable glass is great for everyday use and casual entertaining.</p> <ul> <li>Expertly crafted of mouth-blown glass.</li> <li>Glass remains cool to the touch with hot drinks and will not "sweat" with cold drinks.</li> <li>Glass will not become cloudy over time.</li> <li>Dishwasher safe.</li> <li>Commercial Grade: Thoughtfully designed and expertly engineered to meet rigorous standards and best practices from select commercial testing.</li> </ul>