Which V-shaped single-hole filter cup or fan-shaped multi-hole (three small holes) filter cup can better highlight the flavor of coffee and reduce bitterness?

Sector-shaped porous (three holes) filter bowl.

The three-hole filter cup has many filter holes and is not easily clogged. It is suitable for coffee of various roasting degrees, and the concentration can be adjusted simply by adjusting the extraction amount.

Single-hole filter cups are mainly used for medium-dark roasted coffee such as German roast, while light-roasted ones are more likely to plug the filter holes.

The bottom of the fan shape is usually one hole, two holes, or three holes. The flow rate is slower, so the coffee extraction time will be longer. What you need to pay attention to is the fit between the filter paper and the filter cup. If the filter paper will fit the holes below,

, which may cause the flow rate to be too slow, resulting in over-extraction and a bitter taste in the coffee, so you should choose close fit rather than full fit.