Frozen gel packs can also get the pre-chill job done. Inserting a cooler liner or lining your chest with aluminum foil will further insulate it -- aluminum foil is actually the key to keeping ice ...

These nylon-covered gel packs don’t release condensation ... blocks are a great size for a lunch bag, and you can use multiple in a larger cooler to keep items cold. They earned a 4.6-star ...

From using frozen blocks to stuffing the gaps with old newspaper, here’s how to get the most chill for your buck, without wasting ice or space ...