Best take out/delivery soup around the east village.
I am a fan of the Mount Qi Vegetables Hand-Ripped Noodles in Soup (possibly the longest soup name ever) at Xi'an Famous Foods on St. Marks. Ask to have the noodles packed separately for takeout, so they don't get clumpy. There are other soups on the menu as well, which I haven't tried 'cause they are not meat-free, and I am. But I'm sure they're very good.
Xi'an Famous Foods
81 St. Marks Pl, New York, NY 10003