The roto-molded cooler market has also radically changed storage solutions. Yeti, Engel, Orca, Pelican, K2, RTIC, Orion and most recently Otterbox are among the top brands. Actual comparison is tough, since sizes among the different makes don't always match. All boast ice retention for days, far longer than needed for overnight or weekend trips. When shopping, compare usable interior measurements, weight and construction features, like tie-down points, latches and handles. The roto-molding process is extremely durable yet heavy, a consideration when lugging a full one down the dock. Don't overlook marine-grade plastic coolers like the Igloo Marine Ultra either. They hold ice well, are easier to tote and reasonably priced. With any cooler, pre-chilling and opening the lids only when absolutely necessary will keep ice the longest.