This is Dough (Dookh) . It's an Iranian drink. It's not ayran, that's Turkish (which is written completely different) and is non carbonated. Don't mix it, it comes the way it should be consumed. Sometimes it's mixed with some herbs, like this mint one. Shake it before you put it in the fridge, than you only have to shake a bit when you want to drink it. It might taste strange at first but many people, outside Iran, love it. In Iran it's basically mandatory to like it .