Some food processors may have refrigerated trucks to ensure food doesn't get spoiled during movements. However, most rely on dry ice to keep food in good condition. Dry ice is solidified carbon dioxide at very low temperatures and is a favorite for preserving food. What makes this interesting is that it sublimates, turning into a gas, and therefore doesn't leave a mess. If you're wondering what to do with this preservative, there are several things you need to know.