Clessidra is the stool designed by Mario Botta for Riva1920.
CLESSIDRA (hourglass) is a product born out of Mario Botta’s fertile imagination and wit. The stool is carved out of a single block of scented cedar wood. The solid cedar block, previously squared off, is placed inside a special machine that carves the block around to obtain this highly original shape that almost looks like two hemispheres, one placed upside down over the other. CLESSIDRA stools can also be piled up (upon request): a metal pin can be provided to cross through the centre of each seat so that one stool can be set upon another to create a modern “sculpture” as well as an interesting piece of furniture.