Product Details Return to Top Overview Sleek, modern, and almost magical. These insulated glasses defy all the rules of typical mugs. Double walls insulate your hot or cold beverage and make it look like it’s floating in air. The tumblers are hand-blown of borosilicate glass, making them strong, lightweight, and heat-resistant. It’s no wonder these beauties won the prestigious European iF Design Award.Holds 10-oz.Set of twoMade of borosilicate glassHeat-resistantLightweightMicrowave and dishwasher safe Please use care when placing ice into the glass to avoid fracturing the inner layer.4 3/8" H x 3 5/8" Dia.