In the experimental design studio we lead students to accept the problem of sustainability in architecture through awareness of garbage problem of the world also caused by the building industry. In particular, we focus on perceiving garbage as a resource. Through analyzing the garbage topic, discussing, designing and manufacturing prototypes we are trying to broaden students knowledge of this problem. Furthermore, we believe the physical contact with unusual building material is essential as well as visualization methods used in modeling architecture from garbage. The building potential of waste is enormous and we are trying to make students develop innovative strategies in the domain of architecture. As a case study we will present results of a collaborative studio held in cooperation with ETH Zürich. The task was to visualize daily production of empty PET bottles of a city of Zürich architecturally. Two groups of students in Prague and Zürich were experimenting with material as well as computer modeling to deliver a solution in form of PET bottle tower. We will describe problems of using PET material as a building material as well as results of this still on-going project.