Replaceable: This is an assembleable coffee filter cup with spiral ribs, designed to be compatible with the V60 style filter system. Conical Shape: Compared to traditional flat-bottom or fan-shaped filter cups, the conical design allows for a deeper bed of coffee grounds. Water flows toward the center, promoting longer contact time with the coffee powder for enhanced extraction. Large Single Hole: The bottom features a large central hole that allows water to flow freely, similar to Nel Drip brewing. This enables greater control over brew time and flavor by adjusting the pour speed of hot water, offering a customizable coffee experience. Spiral Ribs: Internal spiral ribs extend from the base to the top, creating channels between the paper filter and the cup. This design helps prevent filter expansion due to steam pressure and promotes even airflow release during brewing, contributing to consistent extraction. Color Options: Black, White, Red, Blue Material: Plastic Package Includes: 1 x Coffee Filter Cup Note: Light reflection and differences in display screens may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.