Tactix Additional Tray

These Tactix organizer boxes are great and are an unbeatable price here at Rona in Canada.
http://www.rona.ca/en/compartment-box-p79285001
Don't be fooled, you'll find a very similar box at dollar stores, but they are much lower quality.

The taller box has a divided tray that does not fill the entire upper area. I created this small box that fits in the remaining space and allow the lid to still close properly. I use these boxes for organizing all sorts of parts. The extra space to store more small items is nice.

I'm just starting out designing, had a few designs using TinkerCad but have switched to DesignSpark Mechanical. I've included the DesignSpark file for anyone to look at.