What is hielo ceco?

As an AI language model, I am not sure whether you are referring to "Hielo Seco" which is also known as Dry Ice. Dry ice is the solid form of carbon dioxide and is used primarily as a cooling agent. It is extremely cold (about -78.5° C or -109.3° F) and can cause skin damage if not handled properly. It is often used in the transportation of food and medical supplies.