Seattle has endured sewage problems since the 19th century, when waste from flush toilets washed back to the city at high tide. Today, it is public potties that have officials of the West Coast city on the edge of their seats. Seattle wants to replace five self-cleaning toilets that were installed a decade ago for more than $5 million but ended up auctioned on eBay for less than $13,000 because they were often used for drugs and prostitution. In its search for the perfect prefabricated public toilet, the city is looking no farther than Portland, Oregon, its trendy neighbor, and the Portland Loo. Patented by Portland in 2010, the toilet reflects the attitude of a number of North American municipalities that simple sidewalk toilets that meet a basic public need while discouraging other uses are the way to go. "It's designed to be not convenient to go into and do something illicit or something you shouldn't be doing," said Linc Mann, spokesman for Portland's