At the time of pouring water with the thermos bottle, the heat-retaining cover needs to be taken off firstly, and then the stopper of the thermos bottle is pulled out. Those two operations not only are much trouble some, but also the stopper of the thermos bottle is easy to slip out of the hand and fall off. The present invention makes the stopper of the thermos bottle and the heat-retaining cover to efficiently combine into an entity by use of a simple method, in which the thermous bottle stopper is made from non-toxic foamed plastics. |