A cooler bag is a type of bag that is designed to keep items cool for a period of time. Cooler bags typically have insulation in the walls of the bag, which helps to keep the air inside the bag cool. This insulation is often made of materials such as foam or other materials that are good at trapping cool air. Additionally, many cooler bags also have a reflective lining, which helps to reflect heat away from the bag and keep its contents cool. When using a cooler bag, it is important to keep the bag closed as much as possible in order to keep the cool air inside the bag. Additionally, it can be helpful to pre-chill the items that you will be putting in the bag before putting them in the bag, as this can help to keep them cooler for longer.
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