The term 'COOLER COOLER' can be solved by the crossword solutions of 'ADE' (3 letters) and 'ICE' (3 letters). The term 'COOLER COOLER' is often used to describe a device that is used to keep food and drinks cold. It is usually made of plastic or metal and contains ICE or a cooling agent such as Freon. The term 'ADE' is an abbreviation for 'Adiabatic Cooling Effect' which is a process in which air is cooled without the addition of energy. The term 'ICE' stands for 'ICE Cube' which is a solid form of water that is used to cool food and drinks.