This is my mashup of the Rugged box from https://www.printables.com/model/258431-rugged-box-parametric/files and the Gridifinity base plate from here https://www.printables.com/model/377158/files\
Also pictured is my Gridfinity Bambu Nozzle part https://makerworld.com/en/models/15120#profileId-14872
The TPU parts are optional. The cushion is meant to keep bins in place and from spilling out.
WARNING: The handle is quite thin so make sure you test it with the weight of what you plan to keep in the box.