PRODUCT INFO The Thermic collection is handmade of durable double walled glass. Due to the borosilicate material, the finely constructed glasses are both microwave and dishwasher safe. Glasses from the range will maintain the hot or cold temperature of drinks while the double wall design prevents condensation to the outer surface. Set of 2 thermic mugs Handmade from double walled borosilicate glass Lightweight construction has superior strength and durability Thermal shock resistant Suitable for hot and cold drinks Microwave and dishwasher safe