Crafted from durable borosilicate glass, this 2-piece double wall cup set offers excellent heat resistance, making it suitable for both hot and cold beverages. Each mouth-blown glass is uniquely handmade by skilled artisans, ensuring subtle variations in thickness and weight. The double wall design maintains beverage temperature while protecting your hands from heat. Safe for refrigerator and freezer use, these glasses are best maintained with hand washing to preserve their quality and clarity. Ideal for everyday use and elegant serving alike.