| 摘要 |
<p>The present invention provides a vacuum bottle comprising: a vacuum container having a vacuum space between an inner wall and an outer wall; and a cap for converting electric energy, which is stored in a battery, into thermal energy and transferring the converted thermal energy to a content contained in the vacuum container, thereby making it possible to efficiently maintain the temperature of the content contained in the vacuum bottle and change the temperature of the content contained in the vacuum container even in outdoor environments.</p> |
