Timely assistance / Industrial Design

We were taking a shower at ease when the heated water was used up. Dripping from the bath, we were ~ with this unexpected embarassment.
In order to fix it, i did some reforms on the regular water heaters by rearranging a part of space for the stored heated water from the container.The prepared heated water could be used as long as you pushed the button.And, thanks to this invention by me, the embarassment can be avoided.