1 Peer-reviewed (refereed or scholarly) journals-Articles are written by experts and are reviewed by several other experts in the field before the article is published in the journal in order to insure the article's quality.
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.
Completely fill the cooler/drinkware with ice, close and lock the lid shut. Place the cooler/drinkware indoors at an average temperature of no more than 80 degrees. Lift the coolers once a day and shut the cooler within 30 seconds of opening. Utilizing the above process, your cooler/drinkware should have some ice remaining after the following number of days/hours: