This set consists of eight (8) borosilicate double-walled latte mugs each (450ml). This material is insensitive to temperature fluctuations and is therefore ideal for both hot and cold drinks and is light yet strong. Each glass has perfect functionality, keeping hot drinks hot and cold items cold. This set can be used as coffee mugs or tea mugs. Great for everyday use, the double-wall design prevents condensation so you don't need to use a coaster saving your coffee table from water stains. The double-wall glass mugs also microwave safe so if you need to reheat your beverage you can return it to the microwave for a quick reheat. Its sleek design also elevates your morning cup of coffee.