Rumble Jar - Next-Gen Cold Brew Coffee Maker for 32oz Mason Jar - 200 Micron Filter Is Ideal for Coarse Grounds & Stronger Coffee - Made Famous on Kickstarter - Includes Mason Jar & Cotton Filter Sock

About this product

*A BETTER FILTER THAT MAKES STRONGER COLD BREW COFFEE: Cold brew experts designed this filter to make professional-quality cold brew in a Mason jar. Our 18/8 stainless steel filter features 200 micron holes, the ideal size for allowing water to circulate and optimal extraction to occur with coarse-ground coffee. It’s a radical improvement to those first-generation brewers with fine mesh screen filters, which are more suited to brewing hot coffee with finer grounds. You’ll taste the difference.

*KEEPS COFFEE FRESHER THAN THE COMPETITION: Oxidation is the enemy of fresh coffee, so the key is to keep air out. Unlike traditional sit-on-top mesh filters, our next-generation filter rests fully inside the Mason jar, allowing the Mason jar’s lid to maintain its famous airtight seal. This keeps your cold brew fresher. The intact seal also means the jar stays leakproof, so ours is truly portable and means an end to coffee leaking coffee all over your hands, kitchen and clothes.

*NOVEL DESIGN BELOVED BY ITS KICKSTARTER BACKERS: The patent-pending capped-filter design features an ultra-sturdy, dent-resistant 18/8 stainless steel filter, with your choice of color for the food-grade silicone cap. The cap keeps grounds sealed inside the filter, while also working as a shock absorber that prevents rattling and protects the filter. Now you can say goodbye to those flimsy mesh filters that can produce weaker cold brew and easily fray, rip and get clogged up.

*BREWING PROCESS IS SIMPLER THAN EVER: Professional-quality cold brew takes less than a minute to prepare at home. After adding coffee grounds and water, just tighten the lid and give the jar a quick shake. That "rumble" step activates the brewing process. Then let it sit overnight and your cold brew will be ready in the morning, tasting like a barista made it. Cleanup is even faster than the prep.

*FULL KIT COMES WITH ALL THE EQUIPMENT YOU NEED: Includes 1-quart (32 oz) Mason jar, metal filter with silicone cap, and a 100% cotton filter-bag that can be used as an optional second stage of filtration if you have to use fine grounds (remember: it’s best to use coarse grounds for top-quality cold brew). Food-grade, FDA-approved silicone cap comes in 3 colors: Dark Black, Orangey-Red, Kickstarter Green. Mason jar comes in 2 designs: Traditional and New & Sleek. BPA free. Dishwasher safe.