A Japanese instruction manual is included as proof that it is a genuine Japanese product. 2 pieces per box Size (per piece): 85 x H125mm Weight (per piece): 185g Full water capacity: 450ml Material: Glass Country of Origin: China Oven microwave dishwasher freezer safe A set of double wall drinking glasses. A revolutionary dual structure that keeps hot drinks warm and cold drinks cold. Also great for soups and cold desserts. Blown glass manufacturing method using heat-resistant borosilicate glass. Hydrophobic silicone vents that equalize the air pressure between the two glass layers. Dishwasher/dryer microwave and oven safe. (up to 180 C) Bodum double wall glasses are made one by one using the glass blowing method by skilled craftsmen. The double wall glass has a double structure of heat-resistant glass that keeps hot drinks warm and cold drinks cold keeping the taste of the drink lasting and keeping it warm. It is a glass with excellent cold storage. In addition even if you put a hot drink in it it will be too hot to hold and even if you put a cold drink in it it will not condense easily so the glass and table will not get wet. (Condensation may occur depending on the temperature and humidity.) It also features a unique design that makes the drink appear to float in the air. . Dimensions : 10.01 x 2.01 x 5cm