Bodum's unique glass-in-glass technology is re-interpreted in a new rounded shape. Two lightweight layers of glass are blown together to create a vacuum layer of thermal insulation. These glasses keep hot drinks hot without burning your hands, while ice-cold drinks stay cool without the hassle of condensation. There will be subtle variations due to the handmade nature of these glasses. View all Bodum products Bodum ® Pavina Double Wall Glass Tumbler 3.25" dia. x 4.5"H Insulated double-walled glass 12 oz. Handmade of lightweight borosilicate glass Dishwasher- and microwave-safe Imported