Cold Brew Mason Jar Filter


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Transform your mason jars into a cold brew maker and enjoy the smoother, more flavorful, less acidic taste. This filter fits right over the wide mouths of two mason jars to sieve out the coffee grounds.

  • Made in the USA: West Bloomfield, MI
  • Materials: High Density Polyethylene (HDPE), stainless steel, vinyl
  • Care: Hand wash with soap and warm water
  • Filters coffee grounds
  • Unique filtration system
  • Filter fits any standard wide-mouth mason jar
  • For use with mason jars only
  • Please note: Mason jars not included
  • Dimensions: 3.5" diameter x 1.25"
  • Weight: 0.5 lb.

56 Reviews (3 out of 5 Grommets)

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Coffee all summer


These filters are such a great invention. The cold brew is great for supplementing the frozen coffee cubes I use to make coffee frappes'.


Happy with Cold Brew Filter


Received the BRUW and am pleased with the ease of use.


Love it!


I’ve been making cold brew laboriously for a year now and BRUW has made the process a breeze! I bought two 64 oz Mason jars to make my brew, and it works perfectly! As someone stated previously shaking the bottles once turned over to filter through definitely helps. I’d definitely give this as a gift again (did that too!). Yes, why didn’t I think of this!More > < Less


Simple but Ingenious


So happy I bought this. It works as they claim it does. I have also come to learn how cold brew coffee it more health benefits when it is cold brewed than hot coffee. You can learn about that on YouTube.More > < Less


Another Brilliant Idea


My husband loves iced coffee and I love to can so this little Mason Jar Filter fits the bill exactly for our family!!!

Items 1 to 5 of 56 total

BRUW | Cold Brew Mason Jar Kit

About BRUW

Mason Brew

Make your very own cold brew coffee, easily. Put this cold brew coffee maker filter onto a wide-mouth mason jar.

It’s super straightforward. Let coffee grounds soak in a cold-water-filled mason jar for over twelve hours. When you’re ready to get your caffeine dose, twist the filter onto that jar with the straw side down. Then twist the second mason jar on top of the filter. Flip. Shake. And watch your cold brew filter through.

In case you’re uninitiated to cold brew, it’s smoother, less acidic, and it’s easier on your tummy (and teeth, too) than coffee brewed with heat. Less acidity also means you can better taste all the subtle flavors—like traces of chocolate, fruit, and nut inherent in different beans.

And even though grown-ups are the ones most likely to enjoy their coffee, this filter was invented by a teen. Max Feber was just 16 when he came up with the idea. It’s one you’ll be able to enjoy every day.