What Is a Phin Filter? How Vietnamese Drip Coffee Is Brewed
What Is a Phin Filter? How Vietnamese Drip Coffee Is Brewed
By Linh Nguyen, Head Barista & Coffee Educator at Hanoi Drip | Last Updated: July 2026
What exactly is a phin filter, and why does it make Vietnamese coffee taste so different? A phin filter is a traditional Vietnamese brewing device — a small metal cup with a perforated bottom, a chamber, and a press insert — that sits directly on top of your mug to slowly drip-brew strong, rich coffee. This gravity-fed method is the secret behind Vietnam's famous Cà Phê Sữa Đá (iced coffee with condensed milk), producing a concentrated brew that is thicker than drip coffee but smoother than espresso. At Hanoi Drip, we brew every single cup this way — no shortcuts, no machines.
The Anatomy of a Vietnamese Phin Filter
Unlike complex espresso machines or delicate pour-over setups, the phin filter is beautifully simple and incredibly durable. Typically made from stainless steel or aluminum, a standard phin consists of four essential parts:
- The Base (Saucer): A flat, perforated plate that rests on the rim of your coffee mug.
- The Chamber (Cup): The main body where the coffee grounds and hot water go. It also has a perforated bottom.
- The Press (Insert): A flat metal disc — sometimes screw-down, sometimes gravity-drop — that tamps the coffee grounds down to control the extraction rate.
- The Lid: A small cover that traps heat during brewing and doubles as a resting plate for the phin after use.
One thing customers ask us every day: "Does the phin need a paper filter?" The answer is no. The metal perforations do all the work, and that means the natural oils from the coffee beans pass straight through into your cup — giving Vietnamese coffee its signature full-bodied, almost syrupy texture.
How Does the Phin Brewing Process Work?
Brewing coffee with a phin filter is an exercise in patience. The process is entirely gravity-fed — no pressure, no electricity, no moving parts. At Hanoi Drip, we brew at 93°C with a 1:8 coffee-to-water ratio, which we've found hits the sweet spot between bold extraction and clean finish.
Here is how the brew unfolds:
- The Bloom: A small splash of hot water goes in first to release trapped CO₂ from the grounds. You'll see the coffee puff up slightly — that's freshness you can see.
- The Fill: The chamber is filled with hot water. The press insert sits on top of the grounds, and the drip begins.
- The Drip: Over 4 to 5 minutes, coffee drips slowly through the perforations into your glass below.
- The Yield: The result is a short, highly concentrated shot — around 60–80ml — that is bold, smooth, and intensely flavourful.
| Brewing Method | Pressure | Brew Time | Typical Yield | Coffee Oils Retained? |
|---|---|---|---|---|
| Vietnamese Phin | Gravity only | 4–5 min | 60–80ml | Yes (no paper filter) |
| Espresso | 9 bar | 25–30 sec | 30ml | Yes |
| Pour Over | Gravity only | 3–4 min | 250–350ml | No (paper filter) |
| French Press | Manual press | 4 min | 250–400ml | Yes |
Why the Phin Is Essential for Authentic Vietnamese Coffee
Most people assume any brewing method will produce the same result if you use the same beans. The biggest difference is that the phin is specifically designed around the coarse grind and dark roast profile of Vietnamese Robusta beans. A paper filter strips away the oils. An espresso machine extracts too fast under pressure, pulling out harsh bitter notes from Robusta. The phin's slow, steady drip strikes the perfect balance.
Want to try brewing your own? Our Vietnamese coffee beans are available for home brewing — the same Robusta blends we use in-store.
A Brief History of the Phin Filter
The phin filter dates back to the French colonial period in Vietnam during the 19th century. The French introduced coffee cultivation to the region, but fresh dairy milk was scarce and expensive. Vietnamese coffee drinkers adapted by using sweetened condensed milk — shelf-stable and rich — and the phin evolved as a single-serve, low-cost brewing device that anyone could use at home or on the street.
Today it is a symbol of Vietnamese coffee culture, found in homes, street-side cafes in Saigon and Hanoi, and right here at our three Vancouver locations. The design has barely changed in over 100 years — because it doesn't need to.
Experience Authentic Phin Coffee at Hanoi Drip
While brewing at home is a wonderful ritual, sometimes you just want to sit down and let someone else handle the slow drip. At Hanoi Drip, every cup is brewed fresh to order using traditional phin filters — you can watch the drip happen right in front of you.
Whether you're grabbing a quick Cà Phê Sữa Đá before work or settling in for a slow morning, check out our full menu to see our traditional and modern Vietnamese coffee creations.
Frequently Asked Questions About Phin Filters
Do I need paper filters for a phin?
No. The phin filter is made entirely of metal with its own built-in perforations — no paper filters required. This is actually one of its biggest advantages: without paper, the coffee's natural oils pass through into your cup, giving Vietnamese coffee its characteristic full-bodied, rich texture. It also makes the phin more eco-friendly and less expensive to use over time.
How long should a phin take to drip?
A proper phin brew should take between 4 to 5 minutes from the first pour to the last drop. If it drips too fast (under 3 minutes), your grind is too coarse or you didn't tamp the press insert firmly enough. If it takes longer than 6–7 minutes, your grind is too fine and the water can't pass through properly. Medium-coarse grind, similar to coarse sand, is the sweet spot.
Can I use regular coffee in a phin filter?
Yes, you can use any coffee in a phin, but for the authentic Vietnamese taste, use a dark-roast Robusta blend ground to medium-coarse. Lighter roasts and Arabica beans will produce a thinner, more acidic brew that doesn't pair as well with condensed milk. At Hanoi Drip, we use our own house Robusta blends — the Hanoi Hustle and Dalat Dream — which are available for home brewing in our wholesale section.
How do I clean a phin filter?
Cleaning a phin is straightforward. Discard the used coffee grounds (or add them to your compost), then rinse all four metal parts under warm water. A mild dish soap works well for removing coffee oils. Most stainless steel phins are dishwasher safe, but hand washing extends their lifespan. Avoid abrasive scrubbers that can scratch the metal and affect the seal between parts.
Is phin coffee stronger than espresso?
Phin coffee is very concentrated — similar in volume to espresso — but it is brewed differently. Espresso uses 9 bars of pressure to extract in 25–30 seconds. Phin coffee uses gravity over 4–5 minutes. Because Vietnamese phin coffee typically uses Robusta beans, which have up to twice the caffeine of Arabica, a phin brew often has a higher caffeine content than a single espresso shot, even though the brewing pressure is far lower.
What size phin filter should I buy?
Phin filters come in sizes from 3g (single espresso-style shot) up to 12g (a larger mug). For home use, a 6g or 8g phin is the most practical — it produces enough coffee for a full glass of Cà Phê Sữa Đá with room for ice. Larger phins (10g+) are great if you prefer a longer, more diluted brew or want to make iced coffee without it getting watered down.
Where can I try authentic phin coffee in Vancouver?
Hanoi Drip Coffee has three Vancouver-area locations where every cup is brewed fresh using traditional phin filters: Richmond at 12560 Bridgeport Rd #140, Rupert Street at 3779 Rupert St in East Vancouver, and Mount Pleasant at 691 E Broadway. All three locations are open seven days a week. You can also purchase phin filters and our house-blend beans to brew at home.
Come Try the Slow Drip at Any of Our Three Locations
Now that you know what a phin filter is and how it works, the best next step is tasting the difference for yourself. Visit us at any of our three Vancouver locations — we'll have a phin dripping for you.
- Richmond: 12560 Bridgeport Rd #140, Richmond, BC V6V 2N5 | Mon–Fri 9am–6pm, Sat–Sun 9:30am–5pm | (604) 270-0876
- Rupert Street (East Vancouver): 3779 Rupert St, Vancouver, BC V5R 5H1 | Mon–Sun 8:30am–7pm | (604) 336-7747
- Mount Pleasant: 691 E Broadway, Vancouver, BC V5T 1X4 | Mon–Sun 9am–7pm | (604) 559-9566
Written by
Hanoi Drip Coffee
Vancouver's Vietnamese Coffee Specialists
Hanoi Drip is Vancouver's home for authentic Vietnamese phin drip coffee. Our team sources single-origin Robusta and Arabica from the Central Highlands of Vietnam, brews the traditional way, and shares everything we know about Vietnamese coffee culture — from egg coffee recipes to phin brew guides.
Experience It In Person
Visit Hanoi Drip in Vancouver
Three locations in Richmond, Renfrew-Collingwood, and Mount Pleasant. Every drink brewed through the traditional phin filter.