Vietnamese Coffee Drip Bags: Ca Phe Anywhere

A drip bag is a single-serve paper filter, pre-filled with ground coffee, with two little arms that hook over the rim of your mug. You tear it open, hang it, pour hot water through, bin the bag. Real brewed coffee, no equipment, ninety seconds.

They're everywhere in NZ now. What you can't easily find is a Vietnamese one.

The format is originally Asian

Drip bags are sometimes sold here as a clever new convenience product. They're not new. The hanging-ear style has been a staple across Japan, Korea, Taiwan and Vietnam for decades, where they're the normal way to get a decent cup at your desk or on a train. In Vietnam they sit alongside the phin as the everyday shortcut: cà phê túi lọc, coffee in a filter bag.

So a Vietnamese drip bag isn't a novelty crossover. It's the format going back to one of the places it came from.

Why the bean matters more than the bag

Here's the thing most drip bag marketing skips: a drip bag holds around 10g of coffee and the water passes through fast. That's a short, relatively weak extraction compared to a phin or an espresso machine.

With a delicate light-roast Arabica, that often lands thin. Pleasant, but closer to a strong filter coffee than something with real presence. Every drip bag currently sold in New Zealand is Arabica of some description.

Robusta behaves differently. It carries nearly double the caffeine of Arabica and a much heavier, chocolatey body, so it still tastes like something after a quick pass of water. The format's weakness is exactly where Robusta is strong. If you want to understand why, our guide to Robusta myths and facts covers the bean properly.

How to brew one properly

1. Tear the sachet, take out the bag, pull the paper arms open and hook them over your mug.
2. Pour a small splash of water just off the boil, around 92 to 96 degrees, and wait 30 seconds. This is the bloom, and skipping it is the main reason drip bags taste flat.
3. Pour the rest slowly in two or three stages, roughly 150 to 180ml total.
4. Let it finish dripping, lift the bag out, bin it.

Two tips. Don't drown it in one go, because fast water finds channels and under-extracts. And use less water than feels right if you want it strong; 150ml gives you a proper cup rather than a weak mug.

Drip bag or phin?

Different jobs. A phin filter holds twice the coffee and brews for four to five minutes, so it makes a far more concentrated cup, and it's the only way to make a proper ca phe sua da. A drip bag is for when the phin isn't with you. We've compared them properly in drip bags vs phin filter.

In the meantime

If you want Vietnamese coffee at home right now, Buffalo Robusta and a phin is the traditional setup, and our Phin'omenal Pair gets you both together. For no-effort iced coffee, there's the Condensed Milk Iced Coffee can.

And keep an eye on this space. We think Vietnamese Robusta and the drip bag format deserve each other.