Bormioli Rocco Fido Squared Wide Mouth Glass Jar with Airtight Gasket Clamp Lid, 101.5 oz Review (2026)

Who needs the largest Fido jar

This 101.5 oz jar, roughly three liters, is built for a fermenter who wants to process a full head of cabbage into sauerkraut, a large batch of kimchi, or several pounds of mixed vegetables in one container rather than splitting the batch across two or three smaller jars. It suits someone who ferments regularly enough to justify a dedicated large vessel, or a household that goes through kraut or pickles quickly enough to make a big batch worthwhile. The squared shape, measuring roughly 140mm across and 242mm tall with the lid engaged, is designed to sit efficiently on a shelf next to other squared jars rather than rolling or wasting corner space the way a round jar would. Anyone fermenting smaller quantities, or without space for a jar this size in a fridge once fermentation finishes, will find the smaller Fido sizes a better fit.

The airtight seal and build in detail

Bormioli Rocco is an Italian glassware maker, and every Fido jar in this line is manufactured in Italy with the same airtight system: a rubber gasket seated under the lid paired with a stainless steel wire clamp that presses the lid down evenly around the rim. That combination is what makes Fido jars a common choice for vegetable ferments like sauerkraut or kimchi, since the gasket lets built-up carbon dioxide vent past the seal under pressure during active fermentation while still blocking oxygen from reaching the ferment the rest of the time. The wire clamp is stainless steel rather than plated metal, which matters for anyone fermenting in brine, since splashed salt water is what corrodes cheaper clamps over repeated use. The glass body is dishwasher safe, but Bormioli Rocco and most retailers recommend hand washing the rubber gasket and clamp assembly separately to keep the seal in good condition for longer.

Living with a full-size jar day to day

The wide mouth on this size makes packing a full head of shredded cabbage and pressing it down to release brine much easier than working through a narrow neck, and the same wide opening makes cleaning between batches simple since a hand and sponge can reach every corner. Once fermentation is active, the size and weight of a full 101.5 oz jar become the main consideration: filled with vegetables and brine, it is heavy enough that lifting it one-handed is not practical, and its roughly 5.5 inch diameter and 9.5 inch height with the lid on can be tight to fit on some refrigerator shelves once the active ferment is done and it moves to cold storage. The squared corners, while efficient for shelf space, are slightly harder to scrub completely clean than a rounded jar, so a bottle brush helps reach into the corners during washing.

How the 101.5 oz size compares with smaller Fido jars

Compared with the 50.75 oz and 67.75 oz jars in the same squared Fido line, this size roughly doubles or triples the batch capacity while using the identical gasket-and-clamp seal system, so there is no difference in how well it holds an airtight seal during fermentation. Against the 33.75 oz two-pack, one 101.5 oz jar holds close to one and a half times the combined capacity of both smaller jars together, but offers only one fermenting vessel instead of two separate ones. Compared with Le Parfait's 2L Super Jar, which holds less at roughly 67.75 oz per jar, this Bormioli Rocco size is the larger single-vessel option among the jars commonly used for vegetable fermentation.

Verdict and who should choose a smaller jar

This is the right choice for a fermenter processing a full head of cabbage or a large mixed vegetable batch who wants one big jar instead of managing several smaller ones. The seal, gasket and clamp quality match the rest of the Fido line, so the only real trade-off is size and weight rather than build quality. Anyone with limited fridge shelf space, anyone fermenting smaller quantities regularly, or anyone who prefers being able to lift a full jar with one hand should size down to the 50.75 oz or 67.75 oz version instead. As with every size in this line, a separate fermentation weight is needed to keep vegetables submerged under brine.

Frequently asked questions