A support fort Nort 16 , Nort 40 boxes from Prosperplast / Kistenberg. allows the boxes to stay vertical so that you can take them out individually. They will work like vertical drawers.
They use a lot of material and it takes a long time to print but I decided to make them this way because I put very heavy stuff in my boxes and I wanted the weight to be distributed as evenly as possible. I included the .step files so that you can adjust them to your needs.
It took a lot of modeling and testing so, if you like them , please give them a thumbs up :)