Drink with a jar

We can often see this kinds of scene in the United State like the image above.

I am from Japan and have never seen to have a drink with jar at any cafe or restaurant in Japan.
That’s why I was surprised at the first time I saw it in the United State more than 20 years ago.
I think it’s OK to use jars. It looks like a kind of stylish, or pretty, I think.
But still I wonder why they use jars for drink in stead of cups:)
A different place has a different culture and it exactly makes me fun!