This is my 1st model posted via Bambu Studio. It is a beam that sits between two aftermarket stackable plastic fridge drawers and holds them together. Previously they would slide all over the place and move around, now the beams and clips hold the drawers in place.

My 1st version is in use in my fridge, whereas my 2nd version is displayed on the build plate and in the emf and stl.
2nd version just rounded some edges.

Note, this works with a certain type of tray that has a rounded edge on top in which the tray above sits within. See last image.
Works well for me so far - and trays can easily be disconnected if/when required.

2 beams are required between each tray - 1 at front and 1 at the back - just need to rotate the back one 180 degrees. You can just print them as is - no supports required. I used PETG, as that is what I had available. Will print my next ones in Transparent.