Black, white and gray are the three most classic colors, and there is always nothing wrong with matching them together.
Looking at it from another angle, does this combination of black, white and gray look like life? Black represents a kind of negativity; white represents positivity; gray, wandering between white and black, constitutes a marginal life attitude, sometimes melancholy, sometimes clear. These three types of ashtrays echo each other with classic black, white and gray, with sometimes hard and sometimes curved lines and details, giving people a strong image and a rich layering. The delicate grinding of the notch grooves gives the smoke a just right parking space, like a lonely hero, staying in a spiritual haven for a while. Sometimes, it is also a virtue to be able to stop and think.