About these, Mr. Grobelny says:
It is a collection of small tables, powder coated steel (white, black and yellow). Can be used as a bedside table or coffee table. The construction is very simple and strong. The internal structural wall separates the two spaces for the books (small version of bookmarks) or magazines (large version of bookmarks). The special notch acts as a bookmark – to put down the book before going to sleep.
(Found at muuuz.)