There is a large bottom and then it has like a detachable slide back and forth insert on top of the bottom part

Perfect drawer insert in kitchen.

Slightly disappointed that the corner of my top insert was cracked upon arrival so it doesn't quite sit nicely on the bottom tray as should

The insert sits nicely on top of the bottom tray and there's enough of a gap that you can get away with actually using the bottom tray to store things without it interfering with the top tray insert