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Cold Brew Mason Jar Starter Pack


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A filter and two mason jars are all you need to make cold brew at home. This full-fledged cold brew maker is super straightforward. The filter screws onto both jars, and sieves out the coffee grounds. The result? A fresh, smooth-tasting, cold-brewed coffee that’s less acidic and gentler on your tummy and teeth than coffee brewed with heat.

  • Made in the USA: West Bloomfield, MI
  • Materials: Filter: High density polyethylene (HDPE), stainless steel, vinyl; Jar: Glass
  • Care: Hand wash with soap and warm water
  • Includes one filter, filter straw attachment, two 32 oz. standard wide-mouth Ball mason jars, two mason jar covers, and instructions
  • Unique filtration system
  • Filter fits any standard wide-mouth mason jar
  • Dimensions: 9" x 8" x 7"
  • Weight: 3 lbs.

21 Reviews (3.5 out of 5 Grommets)

Sorted by Rating

Easy to use and clean, makes great iced coffee


Very easy to use and clean and makes great iced coffee


Simple and great!


Love this! I have more complex cold brew systems but this is better. Simple is often better!




My daughter lovez it. Easy to use...she uses everyday and coffee is never bitter.


Excellent coffee!


This is the perfect item for making cold brew coffee. It is simple to use and easy to wash. Highly recommend if you like cold brewed coffee.


Works very well, cool idea!!!


This Cold Brew filter works well. My wife has truly started to enjoy coffee at home instead of running out to Dunkin Donuts or Bigbucks early so she doesn't miss out. Amazed at the difference between Cold Brew and regular Iced Coffee...
(Double filtering makes a great improvement.)

Thanks to Grommet, I'm a hero!!!
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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.