- Made of Kareline natural composite with ecological energy - 50% pine pulp fiber, 50% plastic - Dishwasher safe Kupilka products are not microwave oven safe. They are food grade items when used with cold and hot drinks and foods. The appearance of Kupilka products is created by industrial designer Heikki Koivurova, whose style combines an earthy attitude with beautiful yet practical design. Kupilka products meet the following requirements for materials and articles intended to come into contact with food: the general and traceability requirements of Regulation (EC) No. 1935/2004, Regulation (EU) No. 10/2011, Regulation (EU) No. 2023/1442, the Finnish national regulation 268/1992 (Ministry of Trade and Industry), Regulation (EC) No. 1907/2006 (REACH), Regulation (EU) No. 1272/2013, Directive (EC) 94/62/EC, and Regulation (EC) No. 2023/2006.