Our top picks are from Yeti and Cooler Shock. Cooler Shock makes the best ice packs for coolers—they kept drinks cold for nearly 48 hours. We also liked the Yeti Ice as a durable pick. Ice packs ...
If you're planning a picnic or taking perishables on a long trip, you might want to know in advance how long your ice packs will last; after all, perishables can only be safely stored in temperatures ...
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