This 4-piece set of Bodum Bistro double wall mugs features individually mouth-blown heat-resistant borosilicate glass construction. Each mug holds 13.5 ounces (400mL) and is lightweight, clear, and smooth to the touch, fitting comfortably into your hand.

The innovative double-wall cup-within-a-cup design keeps beverages at the ideal temperature while preventing condensation on the outer surface. A hydrophobic silicone vent at the base equalizes air pressure between the two glass layers, allowing air transfer while keeping liquid out. Built to withstand extreme temperatures ranging from -30°F to 350°F, these mugs are safe for use in the freezer, oven, microwave, and dishwasher. Ice cubes should be added after pouring the drink, not into the empty glass.