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Silicone Sleeve for Regular Mouth Half Pint 8oz Mason Jars


We love to use glass jars instead of plastic cups for our kids’ beverages, but there is always the worry that they will end up broken on the ground.

These silicone sleeves for Regular Mouth Half Pint (8oz) jars add grip and padding, and they also insulate.

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 food grade 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.


Bulk discounts - buy more and save! Offer ends: June 12, 2021 8:24 pm

Quantity 5-14 15-40 41-99 100+

Mix and match colors!

Our kids use most of the half pint jars that are always littering the kitchen, but I also use them to drink coffee and cocktails.

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.

They have a hole in the bottom to make getting them off easier. Our first generation of this size did not have a hole in the bottom.

You could also use one to block sunlight or prying eyes from the contents of your jar.

Great for kids and adults!

Choose Color

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Mason Jar Lifestyle

Customer Reviews

Based on 18 reviews
Good stuff!

Thanks for the wonderful order.




Works well, love it!

Slippery when wet

These sleeves (8oz and 4oz) do not fit snuggly enough in my opinion. They have decent grip when dry, but if they get the slightest amount of moisture ie. a dribbly toddler using a straw top on an 8oz jar, the sleeves slip right off. Fortunately the 8oz did not break, but we did lose a 4oz jar of baby food, again the jar sliding out of the sleeve when it encountered moisture from the food.
From prior experience with other-brand glass water bottles and fitted silicone sleeves, the sleeves should be a real struggle to don/doff.
Review posted to both 8oz and 4oz product pages.

I'm sorry you are having trouble with our sleeves. We have tried to design them to stay on the jar, but still be relatively easy to get on and off. Unfortunately, jars vary a little by brand and manufacture date, so the same sleeve will fit different jars a little differently. There can also be slight variation between colors, although we try to minimize that. We get more complaints that the sleeves are too tight than too loose, but we do take all feedback into account and try to adjust the products between batches when possible.

Love these!!

Really love having these for my sons jar, helps him keep a grip and gives me peace of mind if he drops his jar.