Dry ice is the solid form of carbon dioxide that sublimates into gas rather than melting into water. It can be used to keep perishables fresh for longer periods of time. Dry ice can be found at grocery stores, gas stations, and dry ice suppliers. There are several types of dry ice and ice packs available, including reusable dry ice packs, disposable dry ice packs, and ready-to-use ice packs. These options are used across various industries like pharmaceuticals, seafood exporting, and food delivery to keep items cold during transport.