I remixed the base of this excellent jumbo catch bin so that the ones I use are stable when stacked. Basically, all I did was shorten the 'hook' side so the top of the bin is flat, and add small feet that will interlock into the opening of the bin below. I like how they turned out and I use them on my reloading press (and for other hobby items) all the time.

For the walls of this bin look at the original: https://www.thingiverse.com/thing:2221473

I print this with supports to build plate only, which creates two small supports on the lower feet. easy to remove and clean up.

I put my bins together with 3mm x 8mm cap-head screws mostly because I already have a couple hundred of them.