 But what you can do, even if you have one that's just glass, you would put your grounds in there like you typically would, like if you're brewing a cup of coffee, but you wouldn't heat up the water. You would use a cool filtered water over it and let it steep in the grounds. Recommend at least 14 to 16 hours. And then after your steep time is done, you would push that plunger all the way to the bottom and pour it out. And...