Vietnamese have quite a unique way to prepare their coffee. One of the most popular coffees is the ice-milk coffee (cà phê sữa đá) which is also popularly called the ‘drip coffee’ by travellers because of how it was brewed… like this and this.
Didn’t manage to drip the coffee myself when I was in Hanoi in July 2008; the cafe I visited served the well-prepared drink instead (pic).
My sister who tried some coffee in Hanoi prior to my visit told me that Vietnamese coffee was stronger than common espresso… can’t agree on that, at least not with the one I had. A decent glass of coffee though… smooth, thick and rich.