Coffee is never the same in two separate places around the world, so CheapFlights has put together a chart to give some more guidance as to what the best brews are around the world.
Travelling to Indonesia recently, I noticed that a small amount of coffee grinds is left at the bottom of the glass, and man is it ever strong. CheapFlights recommends in Vietnam that you go for the iced coffee, again something I can personally attest to. Instead of regular milk, the Vietnamese use condensed milk in their coffees, giving it a sweet flavour that can't be achieved in the same way as sugar. Once you've had one of these, you'll find it difficult to go back to drinking iced coffees bought usually at your local coffee shop.