6 Things to Know About Using Dry Ice for a Week-Long Trip

Dry ice lasts 5–7 days in a good cooler A 10-pound block in a rotomolded cooler keeps frozen food solid for nearly a week if you minimize opening the lid.

Never seal the cooler airtight Dry ice sublimates into CO2 gas, which can blow the lid off or explode the cooler. Leave the drain plug open or crack the latch.

Use a rotomolded cooler, not a cheap plastic one Dry ice is cold enough (–109°F) to crack flimsy coolers. A Yeti or RTIC works; a budget Igloo likely won’t.

You need 50+ pounds for a full week That’s about 10–15 pounds per day for a 50-quart cooler. It’s heavy, takes up space, and is a hassle to find and store.

Handle dry ice safely Wear thick gloves or oven mitts. Keep the car ventilated—never sleep in a vehicle with dry ice, as CO2 buildup is dangerous.

Regular ice is often easier A block of ice lasts 3–4 days and you can restock. Dry ice is only worth it if you absolutely cannot restock frozen food for a week.