Treat your table to a fresh new look with our eye-catching set of Pavina double wall glasses. These stylish tumblers make every drink look like a work of art, as the innovative double wall design has a floating effect on your favorite beverage.But these award-winning tumblers aren’t just a pretty face; they’re really clever too! Individually mouth-blown from heat-resistant borosilicate glass, our double wall glasses have a thermal quality that keeps hot drinks hot and cold drinks cold. There’s a silicone vent at the base of the glass that equalizes the air pressure between the two glass layers when hot or cold liquids are added.