Toilet testing. Engineer using sausage-shaped artificial excrement to test how well a toilet flushes. The toilet bowl is transparent to allow the flushing to be observed. This toilet is a Washlet from TOTO. This companay was founded in Japan in 1917, and has since grown into a multinational company headquartered in the USA. It is (in 2009) the largest plumbing products company in the world. Photographed in Japan.