Wide mouth pint jars have straight sides and are 3 internal diameter. Whether you call it a Koozie, a Kozie, a Coozy, a Cozy, or just an insulating
Silicone Sleeve for Wide Mouth Pint 16oz Mason Jars
Silicone Mason Jar Sleeves - 4oz Jelly Jars (6-Pack, Multi-Color)
Quart 32oz Silicone Sleeves/Jackets for Protecting Ball, Kerr, Canning Jars by Mason Jar Lifestyle (Berry Pink, 2 Pack) : Home & Kitchen
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Quart 32oz Silicone Sleeves/Jackets for Protecting Ball, Kerr, Canning Jars by Mason Jar Lifestyle (Aquamarine, 2 Pack)
Plastic Mason Jar Lid Regular and Wide Mouth Mason Canning Jar Top
Silicone Straw Hole Tumbler with Stainless Steel Band for Mason Jars Wide Mouth / Deep Blue
Silicone Sleeve for Quart 32oz Mason Jars Tangerine
Mason jars are made of extremely durable thick-walled glass that can survive most drops. If you want extra protection, and a better grip, add a Mason Bottle Silicone Sleeve to your jar.
Mason Bottle - Silicone Sleeve 8oz
The Best Way to Safely Freeze Liquids in Mason Jars – Garden Betty
Silicone Sleeve for Wide Mouth Pint 16oz Mason Jars Ultra Violet
Jarjackets Silicone Mason Jar Protector Sleeve - Fits Ball, Kerr 16oz (1 pint) Wide-Mouth Jars Package of 4 (Multicolor) A