Buenos Aires should be called the 'city of really cool markets.' I don't think there is any item that you cannot find there. And more often than not, you will find just the right item that you didn't even realize you were looking for. I came upon this little stand one afternoon, and was struck by the fact that this vendor sold ONLY this one item. I mean, are colorful seltzer bottles in such high demand that one can devote an entire booth to them? Apparently so, because this place was thriving. Of course, I had found that perfect item that I didn't even know I wanted.