Diego and Monica "Zuzz�" has a simple wall hack for us.
"To create this simple but original composition we used the Traby system: 4 shelf units and 2 doors. We removed the door handles and plastered the holes. Then we painted the doors white. We also add the new Grip handles at the top the doors. As alternative drawers, we used two Branas Basket in the two centre shelves."
See more on their blog facciotuttodaseduto (I do everything seated) which is in Italian.