A cool box, also known as a cooler, is a common item that is used to keep food and drinks cold. However, there are many other synonyms that can be used to describe this handy item. Some of the most commonly used alternatives include icebox, cool chest, chilly bin, and portable refrigerator. Other options include cool tote, cooler bag, and temperature-controlled cooler. Depending on the context and the specific needs of the user, there are dozens of different words and phrases that can be used to describe this essential item. Ultimately, any of these synonyms will help to convey the same basic idea - a container that is designed to keep things cool, whether for a picnic, a road trip, or a day at the beach.