Primula’s Double Wall Glass Mug is technology at it’s greatest. This stylish mug is made of borosilicate glass. This design permits the mug to retain heat longer while preserving the freshness of its contents. This ability enables the mug to remain condensation-free. The double wall is not only cool to look at, but allows you to enjoy a rich, satisfying cup of coffee or tea while you admire its beauty. The glass mug is sturdy, without feeling heavy in your hands. The rounded rim provides you with dribble-free, effortless sipping, while the smooth contoured shape feels secure and comfortable in your hand. The handle was carefully structured. It has a wide opening that accommodates large hands and still feels steady and firm in your grip.This dishwasher safe mug is durable, easy to clean, and will continue to provide years of enjoyment. It will quickly become your chosen mug to hold a generous 16 ounces of your favorite beverage.