A Kupilka mug is durable and ecological, can be machine washed, and won't burn your fingers! This special edition is a part of the Mauri Kunnas lineup, and boasts a picture of the little spider you often saw in his children's books. - 300 ml volume - Made of Kareline natural fiber composite, using sustainable energy - 50% pine pulp fiber, 50% plastic - Wash on the go like you would a wooden cup, and in a washing machine at home if you wish - Measurements 116mm x 82mm x 82mm Kupilka products are not microwave oven safe.