Thermax #44933PL from Circleware - Set of 2 double walled, insulated, glass espresso mugs. 2.6oz (77ml). HOT or COLD - Thermax glassware has a double wall construction made of borosilicate glass. These sleek, edge-less glasses can keep cold drinks cold and hot drinks hot. Dishwasher and microwave safe. Each glass: 6 cm diameter and 7 cm high.