Beijing yogurt (老北京酸奶, Lao-Beijing-Suan-Nai). One thing intersting is that you can not take the bottle away, you can only finish at where you buy it, either at mom-and-pop stores or newspaper stands.
Beijing yogurt is to Beijingers as what Oreo is to Americans.
One thing you would find if you were Beijing is that you need to drink it not eat it. Here are two interesting perceptions of how yogurt should be had. One from Beijinger and the other one from a U.S student.
Price: 3 Yuan (50 cents)
Where to have it: It is not hard to find. If you see empty racks of this type of bottle, then you know you are at the right place.
Angela remembers her having Beijing yogurt when she was in primary school.
Tianning talks about the difference between Beijing yogurt and yogurt in the U.S.
David talks about the his first time having having Beijing yogurt.