Coffee filter cup｜Why do coffee shops rarely use fan-shaped filter cups to brew coffee? What are the extraction advantages of trapezoidal filter cups? Which coffee beans are suitable?

I don’t know if you have noticed that, except for some large chain brands, we rarely see trapezoidal filter cups in coffee shops. Compared with trapezoidal filter cups, the appearance rate of cone-shaped, flat-bottomed/cake filter cups is obviously much higher. So many friends are curious, why do we use a trapezoidal filter cup?