Kitchentoolz 64oz Half-Gallon Glass Mason Jars with Metal Lids (2-Pack)

Big Half-Gallon Jars Built for Fermenting and Bulk Storage

These Kitchentoolz half-gallon jars are made for the large jobs a small jar cannot handle.

 Each holds 64 ounces of glass with an extra-wide 110mm mouth, and they are made in the USA from strong, clear glass, which makes them a favorite for brewing kombucha and kefir, fermenting, sun tea, and storing bulk dry goods like flour, legumes, cereal, and pasta. The wide opening means you can fit a hand or a scoop inside for easy filling and cleaning, and the clear glass keeps your contents visible at a glance. Your food sits against inert glass, which is the foundation of getting storage off plastic.

The jars close with a twist-on metal lid that creates an airtight seal, easier to use one-handed than a two-piece canning lid, and convenient for everyday opening and closing.

True Shift Score: 8.1 / 10

This is our own assessment, not a lab result or a certification.

It scores well as big, made-in-USA glass jars that get bulk dry goods and ferments off plastic and onto glass, with a convenient one-piece metal lid and a generous wide mouth. It sits below the Ball jars and well below the glass-lid jars on our material-purity scale for one honest reason: the airtight seal comes from a plastisol plastic liner inside the metal lid rather than a thin edge compound, a glass lid, or a silicone gasket. It is BPA-free and the food sits in glass, but if minimizing plastic at every surface is the goal, that liner is the trade. For convenient large-batch fermenting and storage, it is still a solid choice.

The Honest Tradeoffs

Here is the honest detail that matters for a microplastic-free kitchen, and the manufacturer is upfront about it:

1. The airtight seal comes from a plastisol liner, a BPA-free PVC and polyethylene coating, on the inside of the metal lid. That liner is the sealing surface. 

2. It is BPA-free and your food sits in the glass below it, but it is a plastic liner rather than a glass or silicone seal, so the lid is the one spot where plastic enters the picture. 

3. For dry storage the liner barely meets the food, while for liquids or an inverted jar there is more contact. 

4. If you want zero plastic at the seal, an all-glass or glass-lid jar is the alternative. 

5. Beyond the lid, the metal caps should be hand washed even though the glass is dishwasher safe, and as large jars they are heavy when full and breakable.

How We Evaluate Food Storage

We look at four things, and none is a lab score:

1. Whether the food-contact surface is inert and won't leach

2. Stain, or hold odors, what the lid is actually made of, since that is where plastic hides in most "glass" storage

3. How well it seals and holds up across the fridge, freezer, microwave, and dishwasher, 

4. And how durable it is over years of use. 

The real shift in food storage is getting your food off plastic and onto glass.