Bodum Bistro Coffee Mugs, Double-Wall Insulated Glass, Clear, 10 Ounces Each (Set of 2) Insulated mug: a set of two double-wall Bistro mugs, 10 ounces each; perfect as a Coffee mug, Espresso mug, or a multitude of other hot and cold beverages Heat resistant: Bodum mug is made of mouth-blown, lab-quality borosilicate-glass construction for a durable and heat resistant glass 2-layer design: insulated Coffee mug has a sleek 2-layer design that creates a dramatic optical illusion and prevents condensation Microwave safe: quickly reheat your Coffee in the microwave and toss in the dishwasher when you need a clean; microwavable and dishwasher safe mug Award winning: Bodum Bistro double wall glasses are the winners of the prestigious European if design Award; 1 year Limited warranty