Bormioli Rocco Fido Squared Wide Mouth Glass Jar with Airtight Gasket Clamp Lid, 50.75 oz Review (2026)

Who the mid-size Fido jar suits

At 50.75 oz, roughly 1.5 liters, this jar sits between the smaller 33.75 oz two-pack and the larger 67.75 oz and 101.5 oz single jars in Bormioli Rocco's squared Fido line. It suits a fermenter making a batch that is more than a small side dish but not a full head of cabbage, such as a partial batch of kraut, a jar of pickled carrots, or general kitchen storage for dry goods between fermenting projects. Measuring roughly 4.25 inches in diameter and 8.7 inches tall with the lid engaged, it fits comfortably on most refrigerator shelves once a ferment finishes, which is not always true of the larger sizes in this line. Anyone who wants two jars to run parallel ferments, or who needs a jar much larger than 50.75 oz for a big batch, should look at a different size or pack instead.

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 this jar through a ferment

This size strikes a practical balance for daily use: the wide mouth is roomy enough to pack shredded vegetables and press out air pockets by hand, while the overall jar stays light enough to lift and carry with one hand even when full of brine. The squared shape uses shelf space efficiently, sitting flush against other jars rather than leaving gaps the way round jars do. As with the rest of the Fido line, the gasket is the component that wears fastest with repeated use, so it is worth inspecting for stretching, cracking or a sour smell that will not rinse out before starting a new batch, and Bormioli Rocco sells replacement gaskets separately when that happens. This jar ships as a single unit rather than in a pack, so anyone wanting a backup or a second jar for a parallel batch needs to purchase it separately.

How this size compares with the rest of the line

Against the 33.75 oz two-pack, this single 50.75 oz jar holds close to as much as both smaller jars combined, trading the ability to run two separate ferments for one larger, simpler batch in a single vessel. Compared with the 67.75 oz and 101.5 oz sizes, it stays noticeably easier to lift and store once full, which matters for anyone without a large fridge or freezer shelf. Against Le Parfait's Super Jar line, which uses a wire bail closure instead of a clamp, the sealing mechanism differs in style but achieves a similar airtight result; the choice between the two often comes down to preference for the classic Fido clamp look versus the French wire bail design.

Verdict and who should pick a different size

This 50.75 oz jar is a solid middle-ground choice for a fermenter who wants more capacity than a small jar but does not need the largest size in the Fido line, and who values being able to lift a full jar comfortably. The seal quality matches every other size in the range, so there is no trade-off in performance for choosing a mid-size jar. Anyone wanting two jars for parallel batches should consider the 33.75 oz two-pack instead, and anyone processing a full head of cabbage or a large batch should size up to 67.75 oz or 101.5 oz. A fermentation weight still needs to be bought separately, as it does with every jar in this line.

Frequently asked questions