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Rumble Go: Portable Cold Brew Coffee Maker (filter only)

Rumble Go: Portable Cold Brew Coffee Maker (filter only)

Regular price $19.99
Regular price Sale price $19.99
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Cap + Base Color

Rumble Go could be the world's most portable coffee maker. Just drop the Rumble Go filter into any compatible water bottle, and it's instantly transformed into a portable cold brew coffee maker. The brewing process couldn't be easier: just add coffee grounds and water and give it a "rumble", and your coffee is now brewing! See why it was recommended by Outside Magazine.

Rumble Go's flexible design allows it to extend and fit a wide variety of popular wide mouth water bottlesThe universal, extendable filter is compatible with a range of popular 16-32oz WIDE-mouth water bottles, such as Nalgene®, Hydro Flask®, Klean Kanteen® and CamelBak®. See a list of known compatible bottles (plus instructions for measuring any bottles not listed). 

Don't have a Compatible Bottle? Rumble Go is also available with a bottle.

Brew coffee while you travel. Cold brew might be the easiest way to make coffee away from home. See why

Includes: 
+ 18/8 Stainless Steel Filter, Specifically Designed for Cold Brew 
+ Food-Grade Silicone Cap & Extendable Base (available in 2 colors)

To see what makes our line of filters ideal for cold brew, check out this product teardown.

Nalgene®, Hydro Flask®, Klean Kanteen®, CamelBak® are trademarks of their respective owners, and we are not endorsed by, affiliated with or associated with any of them. We just want you to enjoy their products even more.

Contents

+ 18/8 Stainless Steel Filter, Specifically Designed for Cold Brew
+ Food-Grade Silicone Cap & Extendable Base (available in 2 colors)

Detailed Features

Both Rumble Jar and Rumble Go have similar features that made them both crowd favorites.

Rumble Jar's industry-leading cold brew coffee filter design

The Filter. We engineered an entirely new filter designed specifically for the cold-brewing process. This is not one of those run-of-the-mill cheap mesh filters originally designed to brew hot coffee and then just repurposed for cold brew. Instead, our filters are etched out of a single sheet of 18/8 (Type 304) stainless steel, which makes them lightweight but shockingly sturdy. They're designed to last for years and are a total cinch to clean. Most importantly, the filter's 200-micron hole size allows water to circulate at an ideal rate for steeping coffee that has been ground coarsely, which is the same way the pros make cold brew. This filter is also flexible enough to allow a person to brew with medium-size grounds (commonly found in pre-ground packaged coffee). This filter contains no plastic parts, and it does not require disposable paper filters or reusable felt ones that are a pain to wash and end up costing you money to replace later. Those paper/felt filters just soak up the flavorful oils that are the hallmarks of good coffee anyway, so you won't miss them.  

 

Rumble Jar's innovative cap design allows you to make cold brew coffee more easily

The cap. A patent-pending, FDA-approved, food-grade silicone cap allows the filter to be fully contained inside a Mason jar or water bottle, which keeps it out of the way so it doesn't interfere with the jar/bottle's original seal. As a result, your container stays leakproof and your coffee brews in an airtight chamber. An airtight chamber prevents oxidation (aka the "coffee killer"), so the bottom line is you'll end up drinking better-tasting coffee. The cap's shock-absorbing design also protects the metal filter from dents and rattles, helping ensure it can last for years.  

 

Rumble Go's base adjusts by 1.5" to fit a variety of water bottles

The Extendable Base (*found on the Rumble Go only*). The Rumble Go's silicone base features 11 different height adjustments that extend the filter by up to 1.5" so it can fit a wide range of popular 16-32oz wide-mouth bottles. The universal design means you can keep using your favorite water bottle or repurpose an old one that may have fallen out of use.  

 

Rumble Jar is designed to work in tandem with the durable but easily replaceable Mason jar

The Mason Jar (*for the Rumble Jar only*). An ideal 3-in-1 brewing + drinking + storage vessel with a legendary seal. Our patent-pending design ensures that this legendary seal stays intact as originally designed, allowing your coffee to stay fresher since the jar remains airtight and resists oxidation. Of course, a good seal also keeps it from leaking all over the place. And if an accident happens and you ending up breaking your jar, the good news is how easy and cheap it is to replace a Mason jar. No need to shell out for an overpriced, proprietary piece of glass.

Want to see it in action? Watch our 92-second video 

Ready to shop? Click here

Discounts

Some ongoing promotions to help you save:

  • Free U.S. Shipping. All orders of $34+ are eligible.
  • Buy 1, Get 1 for 25% Off. Discount is automatically applied to your cart as soon as 2+ items are added (i.e. no promo code needed). These orders also come with Free U.S. Shipping.
  • Just buying one item? Our email subscribers get some exclusive discounts, including a discount on the first order. Sign up here to save on your initial order: Rumble Jar email signup 
  • Bulk orders of 10+ items are 25% off. Just email us with the details of your bulk order, and we'll send over an invoice with a 25% discount applied to the full order. Rumble Jar | Contact Us 

 

Shipping & Returns

Orders of $34+ qualify for Free U.S. Shipping. In addition to Free Shipping, customers automatically receive a 25% discount on any second item in their cart (see discount details).

Orders under $34 qualify for flat-rate shipping of $3 to anywhere in the U.S.

For additional shipping and returns info, please see our Shipping & Returns page

Instructions & FAQ

Brewing Instructions: Step-by-step instructions (with gifs!) can be found on our Brewing Instructions page, and we have a bunch of specific tips and tricks in our FAQs.

Cleaning Instructions: Our simple design ensures an ultra-quick cleanup. All of our Mason jars, stainless steel filters and silicone caps/bases are dishwasher safe. The only components that require hand-washing are Rumble Jar's reusable cotton filter bag as well as Rumble Go's optional insulated bottle.

More questions? We have a pretty thorough FAQ section. Otherwise you can always email us.

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  • Free Shipping on orders of $34+

    U.S. Shipping is free on all orders of $34+, so why not get one for your home and another for the road?

    Shipping Info

  • Automatic 25% Discount on any second item

    Order 2+ items and you'll automatically receive a Buy One, Get One discount for 25% off your second item.

    Discount info

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

A Universal, Portable Cold Brew Filter

Rumble Go builds upon the legacy of the original Rumble Jar by adapting the filter to work as an ultra portable brewer. The filter's universal, height-adjustable design transforms reusable water bottles into cold brew coffee makers. This could be the world’s simplest way to make great cold brew away from home.

See Compatible Bottle List

Rumble Go's stainless steel filter is custom-built for cold-brewing coffee
Rumble Go's silicone base is height adjustable to 11 different height settings at a range of 1.5"
close-up look at Rumble Go's 200 micron stainless steel filter

A 25 second overview of Rumble Go

  • Best $20 ever spent. Makes making cold brew cake.
  • Thank you for making this!!! Seriously the best cup of coffee, cold brew, I have EVER had!!!!!
  • Possibly the easiest method to make this magical thing called cold brew.
  • By far the best, fastest and cleanest way to brew your cold brew.
  • Just made my first batch. Holy whoa! This is all I need. Forever! So many options for flavors and strengths, so easy, love it!
  • I love my rumble jar. Amazing coffee. You can taste all the subtle nuances of the coffee. Just amazing.