Erik Olovsson and Kyuhyung Cho have designed the ROOM Collection, a shelving system with stackable blocks. I like how versatile these block are, so that you can create almost any shape or size you need. View more images at Contemporist.
Description from Contemporist:
When it comes to furniture, people are used to placing a object within a square space. While it is common to use a square form to arrange an object, Erik and Kyuhyung were interested in diversifying the relationship between object and space to create furniture as rooms for objects. The focus was to explore the mix-and-match quality of the ensemble in our spaces from a graphical approach.
ROOM collection is a furniture system with 25 stackable blocks and a low table with various geometric voids inspired by architecture and the objects they can hold. When all the elements of ROOM are combined it forms either a long shelf or a tall cabinet with a variety of different graphical compositions. ROOM allows each user to pick their favorite elements to build up your own composition as a shelf, a table or just as a sculpture.