One of the things about Vietnam is that whenever you go to a cafe or a restaurant, they will continue to fill your class or mug with their version of tea for free. Mostly it's green tea. But you get used to drinking it. It's actually pretty good. You can get Lipton iced tea here also. But it cost about a dollar a glass. LOL
Here in most ma and pop restaurants they do the same, keep that tea glass full, we do 50/50 green tea and lipton making our drinking tea, I myself love green tea hot, but the wife is trying to do better and does that
