By designer Guus Oosterbaan.
And I love how he describes this unusual piece:
"My ROCK Radio. The number two in my cement-audio-series. It started off being a very nice rectangular brick shape. Then I found out that a thick layer of cement shields the radio from actually receiving radio waves. With my “Now it doesn’t work anyway” philosophy, I took a big hammer and created this Flintstones look, and the radio works! "