How the Five Compare on the Numbers
The five picks differ most in what their makers publish. The HAVORNYX filter is the only one with a stated diameter and height, at 8.27 inches and 3.15 inches, and the only one stated to fit a 64 ounce wide mouth Mason jar. The Doppeltree bag is the only one published as holding a full pound of grounds, at 12 by 12 inches. The BIMYJ two pack publishes 0.1 pound for the pair and the Doppeltree pair 0.03 pound. The HRX Package is the only disposable option, with 50 bags at 6 by 10 inches. The Bellamei bag is the only one with a published micron rating, at 250 microns, and the only one stated to hold up to 20 pounds of grain.
Where the makers are silent, the table says not published. All five publish a weight, but only the stainless filter weighs one item: the other four figures cover a pair of bags or a box of fifty. Four of the five do not publish a micron rating. None of the five publishes a capacity in ounces of brewed coffee. That means the numbers can tell you which filter fits your jar and which material you are buying, but they cannot tell you how the coffee will taste or how long the filter will last in your kitchen.
The table does not tell you how fine each mesh is in practice, because four makers do not publish a micron figure. It does not tell you how the cotton, nylon, and non woven materials compare in flavor, because no maker publishes a comparison. It does not tell you how many brews the stainless steel, nylon, or non woven picks will survive, because only BIMYJ publishes a reuse count. And it does not tell you the brewed volume, because no maker publishes that figure.
Fit and Vessel Compatibility
What each maker states about fit
The HAVORNYX filter is the only pick with a published diameter, at 8.27 inches, and a published height of 3.15 inches. The maker states it fits a 64 ounce wide mouth Mason jar. That is the clearest fit statement in the group. If your jar is a different size or has a narrow mouth, the published figure is what you check before buying, because the maker does not list other jar sizes.
The Doppeltree bag is published as 12 by 12 inches and stated to fit Toddy cold brew systems, wide mouth Mason jars, glass pitchers, and most standard cold brew makers. The BIMYJ listing gives a size of 7.9 by 11.8 inches in one place and 11.8 by 11.8 inches in a feature, so the two published figures do not match. The HRX Package bags are 6 by 10 inches and stated to suit 64 ounce Mason jars or 1 gallon pitchers. The Bellamei bag is 26 by 22 inches and stated to fit kettles up to 17 inches in diameter.
When fit is the deciding factor
If you already own a 64 ounce wide mouth Mason jar, the HAVORNYX filter is the only pick whose maker publishes both the jar size and the filter diameter. If you own a Toddy system, the Doppeltree bag is the only pick stated as Toddy compatible. If you brew in a large kettle or pot, the Bellamei bag is the only pick with a stated kettle diameter, at up to 17 inches.
If you brew in a pitcher or a tumbler, the BIMYJ listing states its bags fit jars, pitchers, tumblers, and cold brew systems, but the two published size figures disagree. The HRX Package bags are stated to suit 64 ounce Mason jars and 1 gallon pitchers, which covers two common vessels. For any vessel not named by a maker, the published dimensions are the only guide, and where those are missing the fit cannot be confirmed from the listing.
Material and Reuse
Cotton, nylon, steel, and non woven
The BIMYJ and Doppeltree bags are both published as organic cotton. BIMYJ states its bags are reusable for more than 100 brews and machine washable. Doppeltree states its bags should be hand washed between uses to preserve the cotton fibers. Both makers describe the cotton as letting coffee oils pass through, which is a material claim rather than a performance result.
The HAVORNYX filter is 304 stainless steel and stated as dishwasher safe. The Bellamei bag is nylon with a 250 micron mesh and stated as washable and reusable. The HRX Package bags are a degradable non woven material and are disposable, with 50 in the pack. Each material carries its own cleaning routine, and only BIMYJ and HAVORNYX publish a machine or dishwasher instruction.
What reuse means in practice
Reuse changes the routine more than the brew. A reusable cotton or nylon bag is rinsed, squeezed, and hung to dry. A stainless steel filter is emptied and rinsed or placed in a dishwasher. A disposable bag is thrown away after one use. The BIMYJ listing publishes a reuse count of more than 100 brews, which is the only reuse number in the group. The other reusable picks do not publish how many cycles they are stated to last.
The HRX Package listing states its bags can be used for hot brewing and cold brewing, which is the only hot brewing claim among the five. The Bellamei bag is described for all grain brewing as well as cold brew. The cotton and stainless steel picks are described mainly for cold brew, tea, nut milk, and similar uses. None of the makers publishes a comparison of how the materials affect flavor.
Capacity and Batch Size
Published grounds capacity
The Doppeltree bag is published as holding a full pound of coarse ground coffee. That is the largest stated coffee capacity among the five. The HRX Package bags are stated to hold 2 to 3 cups of grounds. The BIMYJ bags are published as fitting 1 to 1.5 cups of grounds. The Bellamei bag is stated to hold up to 20 pounds of grain, which is a brewing figure rather than a coffee figure. The HAVORNYX filter publishes no grounds capacity.
Those figures are not directly comparable, because a cup of grounds and a pound of grounds are different measures. The Doppeltree figure is the only one given in pounds for coffee. The HRX Package and BIMYJ figures are given in cups. The Bellamei figure is given in pounds for grain. A reader who wants a specific batch size should use the published figure closest to the measure they think in.
Matching capacity to your routine
For a single glass or a small batch, the BIMYJ bags at 1 to 1.5 cups of grounds are the smallest published coffee capacity. For a medium batch, the HRX Package bags at 2 to 3 cups are the next step up. For a large batch or a full pound, the Doppeltree bag is the only pick published at that size. The Bellamei bag is published for grain rather than coffee, so its 20 pound figure is not a coffee capacity.
The HAVORNYX filter publishes no grounds capacity, so the batch size depends on the jar rather than the filter. The maker states it fits a 64 ounce wide mouth Mason jar, which is the only volume figure attached to that pick. If you want to know how much brewed coffee you get, no maker publishes that figure for any of the five, so the grounds capacity and the vessel size are the only guides.
Which One Fits Your Kitchen
Wide mouth Mason jar owner. Choose the HAVORNYX filter. It is the only pick with a published 8.27 inch diameter and 3.15 inch height, and the maker states it fits a 64 ounce wide mouth Mason jar. It is also stated as dishwasher safe.
Toddy system owner. Choose the Doppeltree bag. It is the only pick stated as Toddy compatible, published at 12 by 12 inches, and stated to hold a full pound of coarse ground coffee. Two bags are included so one can steep while the other dries.
Small batch brewer. Choose the BIMYJ two pack. It publishes 0.1 pound for two bags and is published as fitting 1 to 1.5 cups of grounds, and stated as reusable for more than 100 brews. Two stainless steel spoons are included.
No cleanup brewer. Choose the HRX Package. It gives you 50 disposable bags at 6 by 10 inches, stated to hold 2 to 3 cups of grounds and to suit 64 ounce Mason jars or 1 gallon pitchers. The maker states they work for hot and cold brewing.
Large batch brewer. Choose the Bellamei bag. It is published as holding up to 20 pounds of grain, with a 250 micron nylon mesh and a drawstring lock closure. The maker states it fits kettles up to 17 inches in diameter.
What We Could Not Verify
Several figures that would help a buyer compare these five are not published by the manufacturers. These are the ones I looked for and could not source.
- A micron rating for the BIMYJ cotton bags, which the manufacturer does not publish.
- A weight for a single Doppeltree or BIMYJ bag, because both published figures cover a two pack.
- A micron rating for the HRX Package non woven bags, which the manufacturer does not publish.
- A reuse count for the HAVORNYX, Doppeltree or Bellamei picks, since only BIMYJ publishes one.
- A micron rating for the Bellamei nylon mesh in cold brew use, which the manufacturer does not publish.
- A brewed coffee volume in ounces for any of the five picks, which no manufacturer publishes.
