Each of these beautiful double wall glasses are hand made of high quality borosilicate glass. The double wall design is not only unique in appearance but also serves to insulate the mug to keep your hot drinks hot, and your cold drinks cold. Double wall glass is cool to the touch when using for your favorite espresso or other hot beverage. The insulating properties are also ideal for serving cold drinks. The sleek double wall design prevents messy condensation and your beverages will remain cool longer! Our insulated glasses are perfect for espresso, coffee, tea, cappuccino and the perfect complement for your liquor shots or highball drinks in the summer.