Fin, I use the plano boxes bought most anywhere and have no trouble with meltdown. colors will bleed if mixed, but boxes don't. Don't know how much room your boat has, but I used a 6 gallon milk crate. Not easy to find. Holds 6 of the bigger boxes or bunches of the medium sized ones. I attached a piece of piano hinge and 1/2" plywood and a swivel seat on top. It was a pedastal/ tackle box. Put the hinge on the forward side so it didn't blow open when trailering. I don't use it as a seat in the new boat, but its still my tackle box. Just food for thought.
Creativity is just intelligence fooling around