Made of durable, heat resistant, mouth-blown borosilicate glass of the finest quality, the CURVA is the latest addition to the Ozeri Artisan Series of award-winning handcrafted drinkware. Borosilicate glass is stronger than common glass, shatter-resistant, and with the CURVAs double-walled design, it offers the ultimate insulation to maintain drinks at their ideal temperature. The CURVAs unique double wall design suspends drinks within an inner wall for an attention-grabbing optical effect. Each glass is made to keep your hands cool even with your hottest drinks, and free of condensation with your chilled beverages. The patent-pending CURVA is great for coffee, cappuccinos, hot or iced teas, cocktails, frozen beverages and much more. Whether it is an occasion for a glass of wine, coffee, or some other beverage, borosilicate glass is completely resistant to acids, and your Ozeri glasses will never lose their original sheen. Each set contains four unique, handmade glasses designed for lifetime use. The CURVA glasses are completely dishwasher, microwave and freezer safe, and ship in an elegantly printed and carefully packaged box with a 1 year warranty.