Most file boxes seem to lack the lid depth that gives the added stability. Another 1/2 to 3/4 inch would be welcome. Dont't let this stop you from buying the Staples product. It is still a good value.
I used these to organized our home office. I covered in wrapping paper then used the Avery® Self-Adhesive Business Card Holders to hold a card (with content) on the end of each box. I can see at a glance what is the box and can easily change as needed. Inexpensive organizing!