The Thermos company website offers coolers, which can be used in place of traditional ice chests, in several styles, including backpack style, duffel style and a classic 24-can cooler. Coolers offered under its Raya brand come in various sizes and have a patent-pending flat bottom design with zippered tops and adjustable straps. The largest models, including the Element5 brand Lunch Lugger, hold up to 48 cans, while compact styles are ideal for toting a six-pack of beverages.
Specialty coolers include a variety of lunch totes, a bowl cooler for salads and a two-bottle wine cooler. Many of the available models come in a variety of colors and patterns, and several boast extra pockets or other convenient features. Thermos coolers can be used with reusable ice packs or without ice to retain cold temperatures in previously chilled items.
While the word "thermos" is widely used to specify any vacuum flask used to keep beverages hot or cold, Thermos L.L.C. is the name of the company headquartered in Chicago, Illinois, that produces these flasks and other innovative food and beverage containers. Founded in 1904, Thermos L.L.C. sold over 2 million units In 2004, and is the worldwide leader in manufacturing insulated food and beverage containers, in addition to children's lunch kits, as of 2015.