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Cold Brew Mason Jar Filter

Cold Brew Mason Jar Filter

Independent Maker

Full Details

  • Made in the USA: West Bloomfield, MI
  • 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
High Density Polyethylene (HDPE), stainless steel, vinyl
Hand wash with soap and warm water
3.5" diameter x 1.25"
0.5 lb
Independent Maker


3 avg. (64 reviews)

Won’t Fit Any Mason Jar I Buy
07/19/2019 by Lauren
I’ve bought three jars so far and the lid fits none.
What am I doing wrong???
07/08/2019 by Laura
I can’t get it to work right. The water just will not drain through the coffee after the first inch or so when I flip it. I keep shaking it to only get a few drops per minute. I left it on the counter to “ do its own thing” and the coffee never drained through the filter. My coffee is standard drip grind... not fine expression grind. I be tried it 3 times. Waste of money.
Works as advertised
05/20/2019 by Vic
Works well and saves space in Fridge. Use frequently as we all enjoy cold brew.
Easy To Use
04/13/2019 by Michael
This filter is easy to use with standard canning jars to create delicious cold-brewed coffee. The price is very reasonable.
Tricky to use, but coffee tastes great
04/12/2019 by Joanne
I wanted to really love this gadget. I liked the idea of re-purposing Mason jars (of which I have many) and I love low-tech solutions. I've made coffee with this filter a few times, and while the coffee comes out very tasty, the filter is tricky to set up, and kinda messy. I already know how to grind and brew hot coffee, and I'm generally pretty handy with kitchen gadgets, but this one is tricky to get working. Issue #1- once you screw on the filter and flip, it filters VERY slowly. Sometimes it stops completely. Yes the instructions say to "tap" the jar, but I literally had to shake it. Issue #2- every time I've used it, it leaks a little around the screw band. My coffee jar ends up sitting in a puddle of coffee, no matter how carefully I screw in each jar, no matter how tightly. So I have to filter it in the sink. It's an interesting idea, but it's a fair amount of fussing for a couple of mugs of coffee. I will give it a few more weeks, to discover if there are any tips I'm missing (different grind or different roast, that will not clog the filter? And pick 2 different jars that may give a better seal?). Was expecting to be more impressed, and I'm just not getting the brew-hah-hah over this gadget.
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Cold Brew Mason Jar Filter

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.


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. more Their Story