The World's Simplest Way to Make Cold Brew Coffee
We set out to make the world's simplest cold brew coffee system: Rumble Jar. We over-engineered every last detail of our filter so that your morning routine would be as simple, fast and affordable as possible. And then we designed the filter to fit inside the time-tested Mason jar. Rumble Jar is all you need to make delicious cold brew coffee right at home. Just add coffee and water.
Introducing Rumble Jar
We launched Rumble Jar on Kickstarter in November 2017. The reception was truly unreal! If you missed our campaign but wanted to check out what the early-adopters think about their Rumble Jars, the Reviews button below will take you to our campaign's Comment section, in all its honest glory.Reviews
I prefer my coffee to be super bitter and acidic.
I'm looking to spend a bunch of money on equipment I don't need so that I can clean it later.