La Casa Botellas in Puerto Iguazu in Argentina is the work of Alfredo Santa Cruz, who is neither architect nor engineer. Initially he built a play-house for his daughter from recycled materials and found the result so fascinating that he decided to continue. He built a residence for his family much in the same spirit as Andreas Froese discusses earlier in this book: to solve the garbage problem in combination with housing shortage. Within the wooden frame he placed about 1200 PET bottles as filling; he made curtains out of the bottle caps, and the roof contains 1300 re-used tetrapackages.