FAQs, Instructions, Tips, Tricks & Bizarre Stuff

Brewing Instructions

Where can I find detailed brewing instructions?

How should I grind my coffee beans?

Do I need a special type of coffee to make cold brew?

Can I shake it a lot? Like, waaaayy more than a few Rumbles?

I noticed some dry grounds in my filter after brewing. How can I fix that?

How long should I steep my cold brew?

Can I fill the filter all the way to the tippy-top with grounds?

How much coffee does a batch of cold brew use?

How much water should I pour in?

How long can I store cold brew in my Mason jar?

Coarse Ground Coffee Questions

What’s the best way to store coarse ground coffee?

Can you ship your coarse ground coffee internationally?

Is there any way of knowing when my beans were roasted?

Can I return the coffee?

Filter Questions

What are the dimensions of the filters?

How much coffee can your filters hold? What is the capacity at each "notch" on the filter?

Why do you use standard Mason jars?

What Mason jars are compatible?

What water bottles are compatible with the Rumble Go filter?

What's the point of having a portable cold brew filter like the Rumble Go anyway?

Do you sell just your filters without the Mason jar?

What's up with the cotton bag that comes with my Rumble Jar?

Why aren't there any holes in the bottom of the filter?

I lost/broke something and need a replacement part. Can you help?

Where are your products made?

Do you have a wholesale program?

Cleaning Instructions

Is Rumble Jar dishwasher-safe?

What's the best way to rinse the filter to get all the grounds out?

How do I clean my Rumble Jar's cotton filter bag?

General Cold Brew Stuff

What's cold brew's #1 enemy?

Why is cold brew coffee so hot right now?

Isn't iced coffee the same thing as cold brew?

Doesn't cold brew have more caffeine?

Does cold brew generally have silt?

Should my cold brew taste watery?

How long can I store my cold brew?

How should I store my coffee beans or grounds?

Why do dark roasts and light roasts have different densities?

Shipping Questions

What are your shipping and return policies?

What shipping carriers do you use?

How long will shipping take?

Do you ship internationally?


Where can I find interesting cold brew coffee recipes?

Can I use Rumble Jar to make iced coffee?

Isn't iced coffee the same thing as cold brew?

What if I like my coffee hot?

Cold brew horchata, anyone?

Sous-vide brew, anyone?

"Tuck into the best coffee ever" Rumble Jar recipe

This ice ensures your coffee will never taste watered down

Frozen cubes of chocolate almond milk

A Superbacker's condensed milk whisk recipe

Secret Tricks

But what if I like my coffee hot?

The perch method

The cotton filter bag straining method made easy

Bizarre Stuff

What is a cup?

Why is it Mason jar with a capital "M"?