In Beijing (and in other north cities in China, like Luoyang), yogurts are sold in the small bottle, like coke.
I love this kind of Yogurt a lot. Didn’t see any of this kind in Shanghai, but in Beijing, it seems most store selling ice cream or coke sell it. You have to stand at the store to eat it because you have to return the bottle to the store. I love this unique experience in Beijing a lot.