I just did a local 5 day cruise with a 40quart Igloo... and found out that I really didn't need to keep much in the cooler. Few beers, cheese, eggs and salsa, and a few other items. Veggies, nuts and tortillas, I just kept in the net bag hanging over the galley area. The ice only lasted 3 days.

A 100 Quart icebox is a lot of space... 200 is huge... for a small boat.

I am thinking of taking up some of that space with better insulation... and maybe just use it as a smaller icebox.

BTW I checked my measurements and calculations a couple of times... the upper box measurements jive with 100 Quart cooler from Walmart. The lower part of the box is narrower, but deeper. It is huge.