Rumble Jar cold brew maker

Easy peasy at home cold brew concentrate contraption. Basically a metal coffee ground holder that floats in a large mason jar and is ready in less than a day. I am sure I could dial in my formula more, but even as is with my medium amount of effort, it’s delicious. I like my cold brew with lots of ice, whole milk, and real maple syrup (easier and more flavorful than making simple syrup).