thermos

noun

1. a vacuum bottle or similar container lined with an insulating material, such as polystyrene, to keep liquids hot or cold.

noun

1. trademark a type of stoppered vacuum flask used to preserve the temperature of its contentsSee also Dewar flask

n.trademark registered in Britain 1907, invented by Sir James Dewar (patented 1904 but not named then), from Greek thermos “hot” (see thermal). Dewar built the first one in 1892, but it was first manufactured commercially in Germany in 1904, when two glass blowers formed Thermos GmbH. Supposedly the company sponsored a contest to name the thing, and a Munich resident won with a submission of Thermos.