Drawers in SOMA.

[Abion47]

Drawers and the things they go in are all separate entities, meaning under normal conditions they will collide with each other. What you need to do is set the drawers and the base entity to a collide group (set the cabinet to "-drawer" and the drawers to "+drawer", or something similar) so the drawers won't collide to the cabinets. As for the drawers colliding with each other, fixing that is going to require some fine tuning on your part to get them positioned just right so they aren't so close that they will harass each other but close enough so that there aren't any noticeable gaps.