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One key component to an efficient walk-in cooler is its insulation. A standard walk-in cooler will have between 2 and 4 inches of Styrofoam insulation within its walls and a rubber sealing gasket around its door to help ensure that it is both airtight and well-insulated against the temperature of the air outside.
Print Email. When you're planning a day outdoors, bringing a cooler can keep your food safe, fresh and tasting great for hours. However, to get maximum mileage out of your cooler â and minimize the chance of food poisoning â you have to load it properly. These simple steps make packing the perfect cooler a cinch: