The double wall insulated glass design creates a thermal effect, keeping your drink hot or cold for a long period while the outer glass remains safe to touch. 8.5oz capacity for enjoying latte, cappuccino, espresso, tea, smoothies, beer, juice and other hot or cold beverages. Made of high borosilicate glass, it would lighter and thinner than the normal glass but durable and stable. Note: Do not use in microwave, do not wash in dishwasher. This product includes only the glass set, without any other products. Due to different lighting and screen settings, the color of the item may differ slightly from the picture. Due to manual measurement, please allow slight difference in dimension. What's in the box? 6 x Double Wall Insulate Glass