Dry ice is very useful to keep food products, especially the frozen ones fresh up to their destination. It is considered as a super cooling agent because of its many uses. The average duration for domestic shipping of frozen food in the United States is 24 hours. Five (5) to ten (10) pounds of dry ice is estimated to sublimate in 24 hours. Hence, to keep the products fresh in transit, the seller should ensure that the amount of cooling material in the shipment is enough. Further, the seller should also consider the type of insulating container to use. The thinner the container, the faster sublimation will occur.