Beautiful grey Moominmamma glass mug from Muurla. The mug is transparent, light, and durable!

Borosilicate is a light yet extremely durable glass type designed for industrial use. It is created to withstand harsh thermal, chemical, and mechanical conditions that are often faced in laboratories. The mug withstands ice-cold and boiling hot drinks. Volume: 11.8oz. Dishwasher safe.