1. The design of the upper large and lower small cup filter cup is large and lower small, which will not be overly smooth and under-extraction, and will not cause over-extraction due to slow flow rate, which is in line with the principle of filtered coffee. 2. Bottom double jamming bottom double jamming design, to avoid filter cups from sharing pot off, the bottom of the 20 petals flowers, good looking and practical 3. Glass coffee dripper with handle is easy to clean. No need to brush to clean it after use, just pour out the coffee grounds and rinse with water, no need for special brushes. It will shine like new after use. 4. Mouth Diameter 10.9cm Height 7.8cm Bottom Diameter (Outer Rim) 9.2cm Bottom Diameter (Inner Rim) 4.7cm 1-4 cups brewing capacity for 1-4 people, good choice for cafe, travel, home and office. 5. Start your coffee trip at home. Enjoy hand-brewed coffee without a café queue. Gift for coffee lovers.