The Pick Up and Caravan mobile storage units by Vitra are like a mobile version of everything you would typically have in a fixed desk or cubical based workstation. They provide some limited local filing for your active work, and they provide a small desktop/pencil drawer environment where you can stow personal implements. They are of two sizes: the two drawer Pick Up and the 4 drawer Caravan. More detail continues below the link.
The Pick up offers two file drawers for your day to day work. Mind you these are not central files - just a place to keep your active jobs given you would use this with a table desk or some other arrangement that does not include file cabinets or built in storage. The top of the Pick Up flips up revealing a small surface for personal effects, be it an in/out box, or family photo, your favorite pens, the tablets you have going. The inside of the cover being metal lends itself to magnets and post its - a small surface to post notes. When the lid is closed there is a lock to secure these personal items, and it also can lock your file drawer closed as well. The Pick Up has a large handle on the side which allows you to tow it around, just like the red wagon you had when your were a kid.
For those with more paperwork and more filing needs the Caravan offers 4 file drawers. BTW these drawers are interchangeable with the Pick Up, and in fact are interchangeable with Filing systems offered by Vitra. So in theory when the project is done your drawer can move to the central filing location and a new empty one take its place. Above the file drawers the Caravan has a small flipper door that opens to reveal a small compartment for personal items similar to the top of the Pick Up. In this case the additional height is taken advantage of by making a top surface instead of the lift top on the Pick Up. This creates a useful standing work surface, a place to have a quick exchange over papers with a co-worker, or an ad hoc presentation podium. The Caravan has the same pull handle as the Pick Up making it easy to tow to where you are needed.
I think these pieces were originally conceived to be part of a hoteling system of work. Your desk remains in the mobile unit, and for days when you are in the office you bring it to the desk you've gotten for the day, and all your work implements are there. But it also makes sense in the day to day workplace. A simple table desk is often more affordable than a complex work station, and a mobile unit like this is a great way to recreate all the storage space a worker would have in a more traditional desk. The fact that it is mobile is a plus for supporting a flexible and actively reconfigured workspace.