Set of 2 bistro double wall espresso mugs from bodum crafted from lightweight thermal lab quality borosilicate glass these mugs will keep your drinks hotter or colder for longer the walls of each glass are hand blown with two layers of clear glass creating an optical illusion that the liquid is suspended inside the two layer construction resists heat and prevents condensation capacity 0 15l 5 fl oz measures approximately 8 25cm high 7 75cm diameter at rim dishwasher safe other size