What is another word for vacuum bottle?
Pronunciation: [vˈakjuːm bˈɒtə͡l] (IPA) 
Vacuum bottles, also known as thermos flasks, are a type of insulated container that keeps hot and cold liquids at a constant temperature. They are commonly used for outdoor activities, camping, and picnics. Synonyms for the term vacuum bottle are a thermal bottle, hot-cold bottle, insulated bottle or flask, or a thermos. Regardless of the name, all of these containers work on the same principle of creating a vacuum between two walls of insulation to slow down the transfer of heat. The variety of synonyms allows users to find the best fitting container that will keep their beverages at a desired temperature for as long as possible.
