It serves as a detachable file cabinet, a stool, a rolling cart and, in multiples, even stackable shelves.
Pretty clever little thing. Though at $700 a pop your library will need deep pockets to outfit your department with these. More info at Better Living Through Design.
The Smith Storage Stool is neat, but given the choice, I’d take a classic Kik-Step® Stool.
Can’t you just hear the hollow thud of kicking one of these? Then the squeak of the wheels followed by a clanking when you stand on it? So good.