A thermal bag is a type of insulated shipping container. It is usually a bag made of materials that have thermal insulation properties and is used to help maintain the temperature of any contents (i.e., cold items stay cold, hot items stay hot).
Commercial thermal shopping bags carried by grocery and retail outlets, as a means to help their customers carry their temperature sensitive purchases home without breaking the cold chain, were first introduced in Europe in the mid 1980's.
Thermal bags for use with pizza were patented in 1983 by Ingrid Kosar of Gilberts, Illinois for the specific use of allowing delivered pizzas to stay hotter, longer. The first commercial application of this thermal bag was by the Domino's Pizza chain in 1984.
Read more about Thermal Bag: Medical Use, Materials, See Also
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