Helen Stephenson is an artist in Edinburgh. One day, while walking from her apartment to her studio, she saw 2 old bathtubs dumped on the street for disposal. She realized that they could be cut and made into chairs. After all, they're already made to fit the shape of the human body.
Stephenson used an angle grinder to trim the sharp edges, then decorated them with tiles to add color and flair. Some are especially vibrant: