A lot of boats come with built-in fishboxes, but they’re not insulated very well; the ice starts melting almost right away. To make sure the fish I keep for the table stay as cold and fresh as possible, I insulated the boxes on my boat with a 1/8-inch layer of self-adhesive foam-and-foil duct insulation, which is sold in rolls at most hardware stores. A few wraps of duct tape keeps it in all in place. I also do the same on the underside of the lid on the fishbox. It’s a quick job, and it keeps my fishboxes as cold as a meat locker.
— Capt. Howard Goldstock,
Boca Raton, Florida