Now you can make barista-quality cold brew coffee at home. Rumble Jar is an award-winning cold brew coffee maker, designed to work in tandem with the classic Mason jar. This 4-piece brew kit is all the equipment you need to make professional-grade cold brew coffee right at home. Just take your favorite coffee beans, grind them coarsely, a
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Honestly, don't know how / why this hasn't been created sooner!
Honestly don't know why this iteration hasn't been thought of sooner! I've tried a bunch of products, but this guy is the best so far. Super easy -- appreciate the coffee ground line on the inside. Makes a good cup of coffee overnight w/ little effort. Thanks Rumble Team!
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Anne · September 18, 2026
Exactly as advertised
I tend to trust companies that aren’t hyper-focused on growth and simply do their one thing really well...and that’s Rumble Jar! Their well-organized and informative website let me know exactly what I needed to in order to decide on a purchase. Product is exactly as advertised; convenient, high-quality, affordable cold brew. I've already referred multiple friends and they also highly approve.
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John · September 16, 2026
the easiest way to make cold brew in the whole world!
i am new to the cold brew game and have been messing around with filtering my coffee grounds through cheesecloth etc. (which is a TOTAL mess by the way) and kep thinking to myself that someone must have invented some contraption that would make this easier..... and then I found the Rumble jar!! and it's a total game changer!!! so easy to use and clean and I LOVE IT SO MUCH!!!!!thank you Rumble Jar people!!