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 CURVA's double-walled design, it offers the ultimate insulation to maintain drinks at their ideal temperature. The CURVA's 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.