Like hand in glove, the Twin chairs by Italy's Euga Design fit together perfectly. They're a set of two chairs that are designed to fit together, creating a simple cylinder. The seats are made of oak scraps covered in oak veneer and invert into one another to store compactly and beautifully. This isn't exactly like other stacking chairs we've seen before. The key to this design wasn't complete efficiency (like stacking 10 or more chairs), but rather a brilliant coupling of two elegant forms into one.