JILLMO Wide Mouth Glass Fermentation Jar with Airlock and Glass Weight, 2L (64oz), Pack of 2 Review (2026)

Who this jar kit fits

This set is aimed at someone who wants to see a ferment as it develops rather than opening an opaque crock to check on it, since clear glass shows brine level, bubbling and color changes without cracking the lid. It ranks first among seven jars in the best fermentation jars guide and first among ten items in the best fermenting equipment for beginners guide, both at a score of 8.6, which points to it working well both as a dedicated jar and as a starter piece for someone new to fermenting. Two jars in the pack let a household run two ferments side by side, such as kraut in one and kimchi in the other, without buying separate lids and weights.

Materials and what is included

Each 2 liter, 64 ounce jar is made from thick, lead free soda lime glass rather than borosilicate, chosen for the wide mouth opening that makes packing cabbage or cucumbers and later cleaning the jar easier than a narrow neck would allow. A clamp lid closes each jar with a silicone seal, and a silicone grommet holds a three piece airlock that lets fermentation gas vent while limiting how much outside air gets back in. A glass weight is included with each jar to hold vegetables beneath the brine line, so the full set needed to start fermenting, jar, lid, airlock and weight, comes in the box rather than requiring separate purchases.

Using and caring for the jars

Setup is simple: pack the jar with vegetables and brine, drop in the glass weight to keep everything submerged, clamp the lid shut and fill the airlock chamber with water so it can do its job. That airlock water needs checking periodically on a longer ferment since it can evaporate. Because the jars are glass, they should be handled the way any thick glass cookware is, avoiding sudden temperature swings like running cold water over a jar that has been sitting in a warm kitchen, which can crack the glass. Light also passes through clear glass more than it would through stoneware or an opaque jar, so these jars do best stored in a cupboard or a dim corner of the counter rather than direct sun.

How it compares with other fermentation jars

QiroGrace's 1.5 liter, three jar kit scores 8.4, giving up some size per jar in exchange for an extra jar to run more batches at once. The ETITSA 2.5 liter single jar scores 8.1, offering more capacity in one vessel but only a single jar rather than a pair. A four jar kit bundling smaller jars with stainless lids scores 8.0, trading glass jar visibility for a metal lid setup closer to a mason jar conversion kit. JILLMO's pack of two 2 liter jars lands at the top of the guide by balancing a workable size with a complete included accessory set across two jars rather than one.

Bottom line

This pack of two 2 liter glass jars works well for a beginner or a household running two ferments at once, since the clamp lid, airlock and glass weight are already matched to the jar rather than something to source separately, backed by a score of 8.6 across two different guides. The main considerations are the light exposure that comes with clear glass and the general care glass jars need around sudden temperature changes. Anyone wanting a single larger vessel instead of a pair, or a stoneware jar that blocks light entirely, should look elsewhere in the same guide.

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