Get the cooler with the rubber gasket.

Yes, it makes a noticeable difference in ice retention.

Coolers without a rubber gasket rely on a plastic-on-plastic seal. That’s fine for a day trip, but the gap lets warm air seep in and cold air leak out. The rubber gasket squishes tight, creating an actual barrier. In side-by-side tests, a gasketed cooler keeps ice an extra day or two.

You’ll pay more for the gasket — it’s usually on higher-end rotomolded coolers (Yeti, RTIC, etc.). But if you’re camping, fishing, or leaving the cooler in the sun, it’s worth it. For a beach picnic or tailgate where you’re opening it constantly anyway? The gasket helps less because you’re letting cold out every time you open it.

If you want ice to last, buy the gasket. If you’re just keeping drinks cold for an afternoon, save your money.

Your future self will appreciate not eating soggy sandwiches.