Sori Yanagi conceived Elephant as a perch for model-makers in his studio. Distinguished as the world's first all-plastic stool when it premiered in 1954, the durable, lightweight, stackable piece is offered in black, red, and gray injection-molded polypropylene, with green and blue to arrive soon. 29 Ninth Avenue, New York, NY 10014; 212-463-5700; vitra.com.