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Silicone Sleeve for Quart 32oz Mason Jars


These silicone sleeves for Quart (32oz) Mason jars add grip and padding, and they also insulate. These fit both regular and wide mouth jars. We have tested current production Ball and Kerr jars, but they can’t fit all vintage jars.

I often use a quart jar for drinking water, but they can be a little unwieldy. The extra grip that a silicone wrapper gives the jar makes it feel much more secure in my hand.

Whether you call it a Koozie, a Kozie, a Coozy, a Cozy, or just an insulating sleeve, it’s perfect for protecting your glass jar from breakage and your hand from cold or heat.

Made of silicone rubber, these sleeves are dishwasher, freezer, and microwave safe! Silicone is a safe, green, non-plastic (BPA free) material for food use that does not leach any chemicals.


I always have a quart of water sitting on the corner of our kitchen counter or my computer desk. The silicone sleeve adds grip, looks great, and I love the feel of it in my hand. A big jar means I don’t have to fill it as often, so I drink more water.

We designed the sleeve to fit tight enough that it won’t fall off, but loose enough that it is still easy to get on and off. Different brands and mouth sizes of jars will vary a little in size, but it should stretch to fit almost any of them.

Use a different color for each family member, and stop wondering which beverage cup is yours!

Microwave safe means you can heat up your beverage without removing the sleeve. Or take out a frozen jar of food, put a koozie on it, and heat it up.

Since they don’t touch your beverage, I often just rinse them, but they are also dishwasher safe. You can leave them on the jar, but I find that water gets trapped so I prefer to separate them to clean the jar.

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Mason Jar Lifestyle

Customer Reviews

Based on 26 reviews
J.S. (Branson, MO, US)
Nice Change

Love the product, awesome quality. Only down side is they are a little loose and not as tight fitting to the jar as I had hoped. I think they should be sized down just slightly then they would be perfect. Worried they will stretch too much with cleaning and use. Also, hope they add more color choices in the future!!!

Teresa Bird (Coos Bay, OR, US)
Great product

This is great and I use it all the time for tea!

Donna Magnusson (Seattle, WA, US)

Actually liked the product very much , but am still looking for a cover that won’t let your drink sweat. Let me know when you guys get that!!! Please and Thank you!

Aileen Foley (Bastrop, TX, US)
Just right

Easy on and off. Excellent fit. Excellent quality.
(Wish more items came in orange)

David Ruple (Austin, TX, US)
Excellent product

The sleeves are an EXCELLENT product that work VERY well. Wish I would have found them years ago, thanks so much!!

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