An Ultra Simple Cold Brew Coffee Maker for Your Home
Introducing the world's simplest cold brew coffee kit: Rumble Jar. We built a cold brew filter specified by coffee experts, and then designed it to work perfectly inside the classic Mason jar. Rumble Jar is all you need to make professional-quality cold brew coffee right at home, as cheaply and quickly as possible. Just add coffee and water and give it a rumble. Shake your way to cold brew coffee.
See how Rumble Jar works, in 92 seconds
We launched Rumble Jar on Kickstarter in late 2017 and were blown away by the reception! Click below to see the early-adopters' reviews in all their 100% honest glory. (hint: we're obviously quite proud of the response!)Reviews