Twin chairs were designed by the italian company Euga Design. They’re a set of two chairs that are designed to fit together, creating a simple cylinder. They are an awesome solution for when you have an extra guest or two. The seats are made of oak scraps covered in oak veneer and invert into one another to store compactly and beautifully. When the Twin chairs are not in use they can be a piece of furniture inspired by the Yin/Yang. - Via - Treehugger