This is a basic style of pet drinking machine to meet the basic needs. The most feared thing in product design is the problem of cost, because the problem of cost will make various compromises. Of course, this is also a very important factor.
When the knob was first designed, I hoped that when the flat buttons were popular now, I would find a little bit of mechanical operation and have a real response. It can also play a little brightness in the overall design. and existing market differences.
Later, it was canceled due to the increase. It is a designer's greatest sense of accomplishment that the product can fall to the ground.