A vacuum bottle is a container which is used to keep liquids either hot or cold. It is composed of a metal container , a glass bottle , a plastic cap , a cork , and a shock absorber. This vacuum bottle is 25 inches in height. The outer part of the bottle consists of a metal container and plastic cap. The container is cylindrical in shape. Its base is flat and circular. It has a diameter of 10 inches. The cap is at the top of the container. Inside the container, there is a cylindrical glass bottle with a tapering neck and a cork at the top. The glass bottle is supported by a spiral shock absorber which is fixed to the base of the container. It has 2 walls : the inner and the outer. Between these walls , there is a vacuum to keep the liquid at a constant temperature. *spiral (adj.) = cycling around a single point