A house made of 13,500 plastic bottles was built by a retired proffesor of mathematics Tomislav Radovanovič. Only the foundation is made of concrete. With the help of his students, compeltion of this house took the builder 5 years. Not only the floor, the walls and the columns and the roof is made of plastics, the house is also equipped with articles made of PET bottles. The kitchen table and the chairs, the lights and even the bathroom was designed from plastics. Some bottles are filled with concrete. some with silicon and the rest is left empty. The shape of the bottles is changed in some cases with the use of heat and wooden or steel mould. Some decorative pieces were painted by the author. Additionally 2500 caps were used just for decoration.