Good design is achieved when functionality dictates form. The double-walled glass of the Bistro line is primarily designed to keep cold drinks cold and hot drinks hot. Although its design features simple round shapes and is intended for everyday use, the glasses are something special. The Bistro glasses are made of extremely heat-resistant, mouth-blown borosilicate glass, which gives them excellent insulating properties. The Bistro glasses are suitable for chilled drinks and all types of coffee and are also safe for the freezer.