I use fish boxes and Plano 3700s. You can fit around a dozen 3700s into em.
The fish boxes are just about the most useful thing Ive found for storing all sorts of fishing stuff. And best of all I found all 7-8 boxes I have, washed up in the surf. (Found one on Sunday)

I keep 2 in the truck as well, one for wet wear and one solely for plugs and extra gear, and Ive used it to hold fish in a pinch when I didnt have a cooler on me.