The Carlisle CM103002 Coldmaster Coldcrock with coaster is a part of the Coldmaster system that is designed to eliminate the inconvenience and mess of ice, as well as reduce the potential of bacteria. The Coldcrock is designed to hold 2 quarts of salad, pasta, dressing and other condiments that need to remain cold. The frozen, non-toxic gel between the walls allows you to transport and keep food items at or below 40 degrees Fahrenheit for up to 8 hours, and up to 12 hours with a lid (lid not included). This item is dishwasher safe, FDA approved, and NSF certified.