学校正在组织科技创新大赛，你想为日常生活中某件物品（如钢笔、书包、鞋子……)设计添加新功能来参赛。请以“My Magic xxx ”为题写一篇英语短文，介绍你的创意。内容：
My magic water bottle will be a replacement of the traditional one which can change the temperature of the inside water automatically according to the changes of the outer environment.
There are certain factors I take into account on my new invention. For one thing, traditional water bottle makes it inconvenient for travelers to have a comfortable drink anytime and anywhere. For another, drinking too cold or too hot water does nothing but harm to our health, so my magic water bottle can serve as an assistant or a doctor.
The new functions will win my magic water bottle enormous love and popularity. On the one hand, the automatic temperature-controlling system mentioned above can adjust the water temperature. On the other hand, we can set a desirable temperature for the inside water, and what surprises us most is that the water can remain at that temperature for about twenty hours.