<p>Inspired by European bistro coffee cups, our double-walled Bistro Collection has a visual delicacy that's functional, too. The glass-in-a-glass design creates a layer of insulation that keeps chilled drinks cold and hot drinks hot. Ribbed detailing on the exterior makes the tumblers easy to hold, and the thin, single-walled rim ensures smooth sipping.</p> <ul> <li>Set of four.</li> <li>Crafted of mouth-blown borosilicate glass.</li> <li>Single-wall rim with fire-polished edge.</li> <li>Keeps drinks hot while exterior remains cool to the touch.</li> <li>Heat resistant to 140°F.</li> </ul>