Our Kaffe coffee cups have a timeless, classic design with the benefit of high-tech tempered glass. Our double-walled glass construction is functional with superior heat retention, but with its clean modern lines it is also truly elegant and a beautiful surprise for guests. Bring sleek, modern elegance into your home in the best blend of form and function. Coffee connoisseurs, or anyone serious about handcrafted coffee, will love this European-inspired espresso cup set. The superior materials mean lasting performance: borosilicate glass is tempered for strength, making it crack-resistant and shock-resistant.