Cloud is a double-sided bookcase created by Ronan and Erwan Bouroullec for Italian brand Cappellini. Cloud is made of white polyethylene made by rotational molding. The bookshelf works equally well as a freestanding unit or against a wall.

Ronan and Erwan Bouroullec are two brothers from France who found an interest in design in the 1970s through their relationship with Issey Miyake. Among the most rising stars in the design world, the brothers can be seen with their creations. Their designs are both functional as it is esthetically beautiful. Ronan and Erwan Bouroullec have been published in "Catalog de Raison" and in the 2003 Phaidon edition.