The Sabine Schober toilet uses the Terra Preta Sanitation technology, which treats urine and excrement by mixing it with charcoal to produce highly fertile soil for reforestation. It is also unique because it can be used in both the sitting and the squatting position. For only about $70, the toilet can be built using three robust components made of sanitary ceramic on the outside and a plastic container on the inside that collects pee and poo.