The Bodum Double Wall Assam Shot/Espresso Glasses are 3 ounces in size and can be used for cold or warm beverages. Its unique design is appealing to the eye when filled with your favorite beverage. With its double layer of borosilicate glass it appears as though the liquid is 'floating' within the glass. This size also works nicely for sake and green tea. The double wall creates a thermal effect, helping to keep your cold drinks cold and your hot drinks hot for longer periods of time. These mouth blown glasses are an exciting product for any home, restaurant, and cafe and are a definite conversation piece. The double wall also makes for a nice votive candle holder, eliminating wax spills and the need for a coaster.