Dry ice works in a rotomolded cooler—but vent it.

Yes, you can, with a few important precautions.

A rotomolded cooler (like a Yeti or Pelican) is basically a thick plastic ice chest. It handles dry ice fine—actually better than a cheap cooler, because the insulation keeps the dry ice from sublimating too fast. You’ll get days of freezing temps.

The big thing: CO₂ gas builds up pressure. Dry ice doesn’t melt—it goes straight from solid to gas. If you seal the cooler airtight, that gas has nowhere to go, and the lid can bulge, crack, or even blow off. So leave the drain plug open, or crack the lid slightly. Never lock it.

Other practical stuff: always wear gloves—dry ice will burn your skin. Wrap it in newspaper or a towel before putting it in, because direct contact with the plastic at -109°F can crack some coolers over time (though rotomolded is tougher). And obviously don’t use it inside a car or tent. CO₂ is odorless, heavier than air, and will displace oxygen. Keep the cooler in a well-ventilated area.

Final thought: That cooler will keep things frozen for days. Just don’t turn it into a bomb.