These appliances preserve perishables for both commercial and non-commercial uses. Refrigerators store and chill perishables. Freezers preserve food items, preventing spoilage. These standalone freezers do not include a refrigeration compartment. Commercial refrigerators and commercial freezers hold more food items and allow for fine temperature control settings than standard refrigerators or freezers. Refrigerated merchandisers and display cases chill and display food and beverages. Kegerators store, tap, chill, and dispense beverages stored in kegs. They use carbon dioxide to dispense beverages.