This ceramic bathroom, shaped like a pee trail, attaches itself to a wall. Inside, a blue seal works as a hygienic liquid that acts as a deodorant barrier, so there's no need to flush. According to the illustration, the drainage exits into the wall which we assume links up somewhere with the sewage system
The Axixa is a design by Mexican Miguel Melgarejo, and could be deployed cheaply and easily on any city wall. Inside there is a traditional U-bend water trap leading to a drainage pipe. The outside could actually be any shape, but a yellow streak of piss seems appropriate enough
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