Furniture Design Sink in Sitting furniture by Keren Shiker 'Sink in’ is an adjustable seating furniture that allows a variety of sitting positions to fit the user comfort in height and size. The ‘sink in’ is built from two wooden frames filled with sponge units which can be moved back and forth, thereby creating various of different chairs models in various sizes and heights. The furniture can be placed vertical or horizontal. When the furniture is unoccupied it is used as a decorative sculptural element in the space. Suitable for adults, youth and children that want to relax and sink in.