The Parapu chair by the Swedish architecture studio Claesson Koivisto Rune was certainly one of the most cheerful green designs of Zona Tortona 2009. The trio designed a children’s chair made with DuraPulp, a fully compostable new paper product created in the PulpLab (a research laboratory based in Sweden). The KTH Royal Institute of Technology and the companies STFI-packforsk and Södra have been collaborating since 2003 to create DuraPulp, which combines paper pulp and PLA (a biodegradable plastic) to create an incredibly resistant paper. Only two millimeters thick, DuraPulp can bear weight, tension, and humidity, as well as temperature changes.