The word "thermoses" is a plural noun that refers to insulated containers used to keep liquids hot or cold. The correct spelling of "thermoses" is /ˈθɜːrməʊsiːz/. The first syllable of "thermoses" is pronounced /θɜːr/, with the "r" sound pronounced at the end. The second syllable is pronounced /məʊ/, with the long "o" sound. The plural "es" at the end is pronounced with a /z/ sound, making the final phonetic transcription /siːz/. Remember to use uppercase letters for the first letter of a sentence and the word "IPA" to start with.
Thermoses, also known as vacuum flasks or thermos flasks, are portable containers specially designed to keep the temperature of hot or cold beverages or food items unchanged for a prolonged period. This term is derived from the brand name Thermos, which became synonymous with the product during the late 19th century.
Thermoses are typically made of two layers of glass or stainless steel with a vacuum-sealed gap in between them. This vacuum acts as an insulator, preventing heat transfer by minimizing the conduction, convection, and radiation of thermal energy. The container is generally accompanied by a screw-on or snap-type lid with a built-in rubber or silicone gasket to ensure an airtight seal.
The primary purpose of a thermos is to retain the temperature of the liquid or solid contents stored within it. Whether it is a hot beverage like coffee, tea, or soup, or a cold drink such as water, juice, or soda, the vacuum insulation of the thermos helps to maintain its original temperature for an extended duration, often several hours.
Thermoses are widely used in various settings, including picnics, outdoor activities, school lunches, and office environments. They offer the convenience of enjoying a beverage or meal at the desired temperature, regardless of the surrounding conditions. Additionally, thermoses contribute to waste reduction by eliminating the need for disposable containers and reducing the consumption of energy used to reheat or refrigerate the contents.
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The word "thermoses" is the plural form of "thermos", which refers to a vacuum flask used for storing and transporting liquids while maintaining their temperature. The term "thermos" originated from the German word "Thermosflasche", which was a trademark for a kind of vacuum flask invented in 1904 by Sir James Dewar. This flask had a double-wall construction with a vacuum between the walls, allowing it to keep liquids hot or cold for extended periods. Over time, the term "Thermos" became synonymous with vacuum flasks in many languages, and "thermoses" naturally emerged as the plural form.