I use click and connect tool box from amazon.. https://www.amazon.com/Stanley-Tools-STST19900-Connect-Organizer/dp/B01NBJ8GBF?keywords=click+and+connect+tool+box&qid=1532213066&sr=8-2&ref=mp_s_a_1_2 Works great I put the big ships in the top and all the smaller ships and squadrons in a couple of the smaller clip on pieces on the bottom
It's the bottom piece of a Stanley click and connect set. Absolutely perfect for armada. You can get a big top box and lower part combo (this piece) on amazon and then buy as many lower pieces as you want.
In the top I have all medium and large ships plus a Plano case for tokens. The two compartments in the lid hold dice and command dials perfectly in one with damage deck, objective tokens, and speed dials in the other.
One lower box contains all my small base ships and another lower has all my many squadrons.
Stanley Hand Tools STST19900 Click & Connect 2-in-2 Deep Tool Box And Organizer https://www.amazon.com/dp/B01NBJ8GBF/ref=cm_sw_r_cp_api_MFZwzbF7J4YBB
It can be really cheap or overly priced on amazon. Hardware stores might have it. I love that I can keep adding layers to it. And honestly, a small Plano holds more than enough defense tokens, objectives, etc. this one fits right in the upper box resting on the yellow dividers. Since the lid is deeper where the handle is on top, the Plano isn't squished when the lid closes.
Plano Moldings #3600-20 Utility Stowaway Organizer https://www.amazon.com/dp/B00C9ZULAI/ref=cm_sw_r_cp_api_sKZwzb3NG29N7