I've had good results with Harbor Freight tool bags, their knock off Pelican cases, and divided parts boxes.
I use the tool bags for handhelds and chargers when I travel, plus misc antenna parts, cell phone amp, extension cords, plugs and misc wall worts, etc. Since all the bags are black, I use colored luggage tags to tell them apart.
I use their knock of Pelican cases for test equipment, portable and mobile radios.
The plastic divided parts boxes (which come in a variety of sizes) are used for small parts. I have a couple dedicate for SMA connectors and adapters.
I have a larger, open top type carrier that I keep in my 4Runner. It holds bottled water, TP, hand cleanerr, Bungee cords and misc. items.
These frequently pop up on sale.