What i like to do is get sock separators specifically these
https://www.amazon.com/gp/product/B07TPRTV6P Then i use my glue gun to glue the 2 pieces together (mind the orientation)
Then i take a piece of a carboard box and cut it to fit under one side with the zipper (this adds strength and stability to the bottom, but it's optional)
Then i cut the other zipper panel out.
I use poly bags to put my figures in and put those bags in the figures in the seperator
this will hold 24 figures for each one. if you use poly bags you can fit 2-3 in each slot if you desire. this keeps them pretty protected when i'm not playing around with them.
and before anyone asks, i would love to display more of them but i don't have the room at the moment. until then this keeps them safe and categorized.