This set consists of eight borosilicate double-walled coffee mugs each (355ml). 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 for coffee 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. Its sleek design also elevates your morning cup of coffee.