Mafoombey is a cardboard space for listening to music designed by Martti Kalliala & Esa Ruskeepää.
"The structure consists of 720 hand-cut pieces of cardboard sliced horizontally, then stacked on top of each other with no adhesive. It was designed using 3D modelling and scale models with the help of architect friend Martin Lukasczyk. The space includes a sitting area for two to three people and a DVD player to play music. Energy-saving lights and surround-sound speakers are built into the 360-layered structure, with one central wire leading out to plug in for electricity.
The cardboard was donated to the students from Finnish paper manufacturer Stora Enso, in whose factory the students cut the pieces with a controlled knife cutter one-by-one. The design won the competition and was built, becoming the first built project for the 26-year old architects."
More info and pictures here