While he's tried it with various colored inks, wine and even beer, coffee has become his medium of choice. And it's absolutely mesmerizing to watch. Here's a closer look at the Coffee Drop Printer ...

And yet, if you walk into a Starbucks today to pick up a coffee you ordered in the app, it’ll still have a handwritten note ...

While he's tried it with various colored inks, wine and even beer, coffee has become his medium of choice. And it's absolutely mesmerizing to watch. Here's a closer look at the Coffee Drop Printer ...