This delightful shelf is called 'Limited Fungi' and was made by Katharina Mischer for Droog Products. When you purchase a shelf, part of the money goes to the environmental projects that try to save the specific fungi species featured. "A limited design for unlimited life'! (made of rotten wood, tin and resin) I can see an entire wall filled with these shelves - creating a personal 'wall of curiosities'...
