This is a movable shelf that is revealed when a cabinet door is opened. Also known as a pull-out shelf or pull-out drawer.

A roll-out tray is an alternative to standard drawers, which are visible compartments with a front panel. This means that the exterior access can present like a door but the storage is that of a drawer inside. This is for those who want to keep the look of the exterior consistent with the other doors and/or want full access storage that is not hindered by a cabinet frame.