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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.
On hot days, water beads wrapped in a bandana works great for a neck cooler. Stick the bandana in the freezer for about 15 minutes for a bigger chill. Water beads are easy to use. Just follow the directions and care instructions below.