The Vintage Thermos King-Seeley Model 1155/3 insulated jars are a collector's item that showcases the durability and quality of Thermos products. Made of plastic and manufactured in the United States during the 1970s, these 8oz food soup containers are a sturdy and reliable option for keeping food hot or cold. With the Thermos brand known for its insulation capabilities, these jars are not only a nostalgic piece of lunchtime history but also a practical and functional item for everyday use.