For the really small nymphs, the peanut butter containers work great
Just to add to the whole home ideas, i found this cool thing for my cannibalistic mantis, helps to save space too!
It's made for fish, the thing in the middle is a divider
Bad quality but those are pre sub Hierodulas. You can't see this part, but i have two layers of twigs and branches (kind of like a checkered pattern) glued to the top.
There is now a vertical twig that extends from the floor to the roof. The purpose of this is because some mantises fall when flipping after a molt, so i like to let them grab the stick and climb to the top, where they will dry ( i find that this technique generates fewer crumpled wings).