Rumble Jar cold brew coffee maker

A better cold brew coffee maker

A Better Cold Brew Coffee Maker for Your Home

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New! Rumble Jar just doubled in size

The same filter from the original Rumble Jar. Now available in a half-gallon size.

64oz filter

How easy is it?

quick instructions

See how Rumble Jar works, in 92 seconds

Available here soon: Rumble Go

A truly portable cold brew maker

Rumble Go™  features a universal, height-adjustable filter that transforms a water bottle into a portable cold brew coffee maker. It could be the world’s simplest way to make great cold brew outside your house. And guess what? There's a good chance you already own a compatible bottle. Check it out here

The Rumble Go cold brew coffee filter has a universal design to fit a wide range of popular water bottles

Simple and smart.

To build a better cold brew filter, we needed to re-think the tiniest details. Rumble Jar looks simple, but it's packed full of smart features. 

Details
Rumble Jar's stainless steel construction is far more durable than typical mesh filters

Outstanding Reviews

We launched Rumble Jar on Kickstarter in late 2017 and have been blown away by the reception ever since. Heck, it even earned us a Kickstarter Project of the Year award! Just have a look at our reviews.

Reviews

Cold brew tastes better

There's a reason why you're always hearing about cold brew coffee, and that's because a lot of folks find it just plain old tastes better. The secret is that cold water extracts about 70% less acid from the coffee grounds than hot water, which means that your coffee ends up tasting a lot less bitter. So if you're new to cold brew, get ready to enjoy a smoother, sweeter flavor of coffee. 

Cold brew science