The project of PETree was started by PET-MAT (Nováková – Prokop) and Experimental studio Achten-Nováková at Fa CTU Prague with support of KMV a.s. It is a pilot project of an experimental construction made by selfbearing PET-bottle structure in form of a 5 meters tall christmas tree. The structure is hollow and works as an exhibition room in order to mediate information on the facts about reusable waste, focused on plastic garbage, represented by PET bottles. The tree has the aim to show the value of plastic PET garbage and its unbelievable quantity, which depends on consumers: all of us. The tree consists of 12 thousand 1,5l PET bottles, connected by wireframe and ropes. One Primary school and twelve highschools from Prague, Mladá Boleslav, Kolín, Slaný and Sedlčany took part on collection and they were also building a construction panel with decoration. The tree is enlightened at night with interesting lightshow delivered by IIM CVUT Prague. The PETree exhibition is open daily from 9 AM to 10 PM.