4 Things to Know About Replacing Ice in a Cooler

Replace ice when it’s mostly melted Once ice turns to water, the temperature climbs fast—especially if you open the cooler often. The danger zone for food is 40°F–140°F.

Block ice lasts longer than cubes Cubes have more surface area and melt quicker. For a day trip, expect to replace cubes every 4–6 hours, while block ice can last a full day or more in a decent cooler.

Use touch and sight, not a timer If the water feels warm to the touch or food starts floating in lukewarm water, change the ice. Common sense beats a timer.

Invest in a good cooler A cheap cooler loses ice fast. If you cool food often, a well-insulated cooler is worth the money.