3 Steps to Pre-Chill a Cooler for Better Ice Retention

Put a large block of ice or frozen gallon jugs into your cooler the night before you leave. This pre-cools the interior so fresh ice lasts longer.

Close the lid and let it sit overnight. The cold mass chills the walls and insulation.

In the morning, dump the melt water and pack your food and fresh ice on top. The now-cold interior keeps everything colder from the start.