R.J.
Ziplock (or store brand) screw-top containers ONLY.
Seriously. They're the only containers allowed in the house. Well...not really...but I keep the others stashed in an awkward place in my pantry, so it's ESSENTIALLY true ;)
We typically have about 40-50 in the house. They all stack, and the lids all stack, and there's no worry about finding a matching lid, because they're all the same. & I never have worry about throwing out "science experiments". Eeeeeeeew. I can scrape them down the disposal...and then screw the lid on and toss them in the recycling. Whenever they go on sale I buy a couple packages more to replace those MIA or turned into a chew toy by the dog, or those that were sacrified to the gods of recycling.
They keep soups as well as non-liquids, like salads/pastas/what-have-you.
For the rest I use store brand ziplock type plastic bags.
I'm ADHD so I have to keep things super simple and super organized...or I'd never be able to find anything. Or to be more precise, *I* would know where everything is, but no one else would. I do the same thing with socks. Except for super-fancy special occasion stuff, everyone in the house is allowed ONE kind of sock. Then I just sort into piles of "kinds" (ie blue toe is my son, solid white is me, grey bottom is my husband, etc)...and the can roll them if they please, or just grab two from their drawer.