Elevate your coffee brewing with our Rhombic Filter Cup. Crafted from durable PCTG plastic, the innovative diamond-shaped design optimizes water flow through coffee grounds for superior extraction and enhanced flavor.

• Free 20 sheets of V-Shape filter paper for all options (white)
  
  
• Golden Cup Extraction Design: Interior features 24 W-shaped ridges at top to control water flow and 12 radiating bottom ridges to promote airflow, preventing over-extraction for optimal taste balance.
  
  
• One Year Development: Extensive testing created this advanced airflow system with fine-to-coarse ridge design, enabling anyone to brew American Golden Cup standard coffee.
  
  
• Minimalist Three-Color Design: Nordic-style aesthetics available in multiple stylish colors to complement any coffee setup with sophisticated elegance.
  
  
• Food-Grade PCTG Material: Baby bottle-grade BPA-free construction with temperature resistance from -30°C to 110°C for complete safety and durability.
  
  
• Rhombic Groove Pattern: Interior ridge design ensures wet filter paper adheres completely to walls, eliminating adhesion problems for consistent brewing performance.