How Long Does Dry Ice Last?

In a larger, well-insulated container with multiple blocks, dry ice can last up to 3 to 4 days. Outside or in less insulated containers, it lasts much shorter—only a few hours.

To maximize how long dry ice lasts, store it in a cooler with good insulation, keep the lid closed, and avoid airtight containers to reduce pressure buildup. The colder and drier the environment, the slower it sublimates. Dry ice will never melt into liquid; it always changes directly to gas at -109.3°F (-78.5°C).

Nearby questions in this topic include How Long Does Pizza Last in the Fridge? and How Long Is Bottled Water Good For?.

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