Gridfinity lite - economical plain storage bins from @jake_worrell with the end cut off so you can get longer objects on a standard 256x256 printer. For example mine caps out at 6 and I needed some 7 and 8 length bins for tools and other parts.
The author remixed this model.
Removed the end off the bin so that they can be put together for longer objects than can be printed on a 256x256 printer