Rotomolded with a brass-free drain plug.

Yes, that specific. Saltwater destroys cheap coolers. Go rotomolded for insulation and durability, and make sure the drain plug is plastic or stainless steel — brass corrodes fast in salt air. A lid that locks tight helps too, because fish smell attracts things. Skip anything with exposed metal hinges or latches unless they’re marine-grade stainless. And get one you can hose out without worrying about rust. Future you will thank present you.