why this product

This cold brew coffee set features a reusable cotton filter, which reduces the costs and materials associated with traditional disposable paper filters. The kit comes with a handmade, 100% organic, untreated cotton filter, specially shaped to optimize brewing within the Mason jar. If used daily, the reusable cotton filter should last nine months to a year before it needs replacing. 

use & care

Preshrinking the filter before using: Boil new filters in fresh water for 10 minutes to pre-shrink before first use. Filters will continue to shrink slightly for the next few uses and will produce best quality brew from then on. Reusable cotton filter should last for nine months to a year with regular use. Replace filters when richness of brew begins to decrease. To make cold brew coffee: 1. Place cotton filter inside the Mason jar, wrapping the mouth of the filter snugly over the jar opening. Add 6 ounces to 1¾ cups of freshly ground coffee (medium to course grind) to the reusable cotton filter. 2. Bloom to start (wet grounds thoroughly and let sit for 60 seconds). 3. Twist neck of filter, and wrap tie string around neck a few times, then slip neck of filter through glass ring.  4. Fill jar with cold water and allow to soak overnight in refrigerator anywhere from 12-18 hours. 5. Remove filter and rest in mouth of jar to fully drain. 6. Top off cold brew jar with fresh water to desired brew strength.

production & design

Inspired by homemade cotton coffee filters during their travels in Costa Rica, Corina and Robert Guillory began testing and experimenting with their own versions once they returned home to Austin, Texas. After much research and testing, they eventually developed a Chemex compatible model. Since then, they have produced many different types and shapes of coffee filters to fit various brewing methods.

about the designer

DIY Cold Brew Coffee Sets

Kaufmann Mercantile from New York, NY
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Cold brew kit with reusable coffee filter and glass Mason jar. Hand-sewn from 100% organically grown, untreated cotton, the filter is specially cut and shaped to fit snugly over the jar’s rim. Comes in 32 ounce and 64 ounce sizes. Made in the U.S. (more info)

More Details

  • Technical Specifications:

    32 ounces (1 litre)
    3.4 inches wide x 6 ½ inches high

    64 ounces (1.89 litre)
    3.4 inches wide x 9.5 inches high

    Cotton pouch: 12 inches deep (30.4 cm)

    100% organic cotton

    Made in


  • Dimensions: H 1.0 Inches x W 1.0 Inches x L 1.0 Inches
  • Product Code: V176000283287

Shipping & Returns

  • This item ships directly from Kaufmann Mercantile in Brooklyn, NY
  • Item is ready to ship in 1 - 3 Business Days. Delivery date will vary depending on your shipping address.
  • International orders may experience possible delays and take longer to arrive.
  • We accept complimentary returns within 14 days of receipt if the item is unused and in original condition.
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