Luciano High Borosilicate Double Wall Glass Espresso Set This set of Isotherm Double Wall Glass Cups is composed of 2 80ml cups without handles. They come in a gift box and are not only elegant, but they also light and when you use them once, you feel like you cannot use normal glass anymore. Double Wall Glass Cups help keep the temperature of the liquid inside. They are called Isotherm. The outer wall in contact with your hand remains at room temperature, while the internal wall and the space between two walls keep the temperature of the liquid inside whether cold or hot. High Borosilicate glass is extremely resistant to hot and cold temperatures. This is why these cups are especially convenient for hot or very cold mixtures, coffee, tea, espresso, for hot or cocktails and shots for cold. Other sizes of this shape are 250ml and 350ml, and there also similar shapes with handles of 80ml, 250ml and 350ml. It's preferable that all double wall glass items are not washed in dishwashers. Luciano High Borosilicate Double Wall Glass Items are made in China in Luciano Glass Factories, and they are tested for safety and food security.