I recently received the following images from a happy customer who ordered two custom drawer inserts, and they sit in the same drawer, one on top of the other. The top insert fills the width but not the depth of the drawer. She can move the top layer to the front or back of the drawer to access the items underneath. Clever. And it looks great!
This is a great solution for tall drawers and for tiny kitchens where some drawers need to pull double duty.