New York City and the surrounding area is one of the most diverse and unique locations in the US. Specifically in Brooklyn and The Bronx we see a huge amount of Yerba Mate drinkers. Check out some of the suggested spots to find your Yerba Mate
Porteñas provides Yerba Mate energy juices and yerba to brew at home. The products are sold at two of the Mercadito locations in Brooklyn. It's a cool shop selling juices and empanadas. Below is the information for the Lorimer street location. They also have a location a few blocks away at 649 Grand Street.
First off, I get excited just knowing there is a restaurant called El Mate. I haven't been here but definitely will visit the next time I'm in Brooklyn. They serve snacks, dinners, yerba mate, and Malbec.