What is another word for thermos?
Pronunciation: [θˈɜːməs] (IPA) 
A thermos is a container that is designed to keep the temperature of its contents constant. There are many synonyms for a thermos, including a vacuum flask, a double-walled bottle, an insulated container, a hot or cold beverage carrier, or a thermal container. The primary purpose of a thermos or any of its synonyms is to keep liquids or food at their desired temperature, whether it's hot or cold. Vacuum flasks are commonly used for transporting hot beverages, while double-walled bottles are great for cold drinks. Insulated containers are used to carry both hot and cold food, while a hot or cold beverage carrier can specifically hold liquid. Finally, a thermal container can keep the temperature of any food or drink constant.
