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Mason jars are thick-walled, wide-mouthed jars made of heat-tempered glass. They are able to withstand the heat and pressure associated with water bath and pressure canning. Ordinary glass jars can break under the strain and heat of canning, so if you are planning on using a pressure canner, make sure that you use Mason jars or an equivalent canning-style glass jar.

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Mason Jars

If you are planning on home canning or selling foods with extended shelf lives, you will often run into the term Mason jars, especially when dealing with pressure canners. Maybe you're planning on preserving those peaches you picked up today, or maybe you want to try your hand at making salsa for the coming winter, or maybe you've got a food product you're developing for mass distribution.

Mason jars are exactly what you need to preserve fresh foods for later use. There are many glass jars that are available for purchase or reuse, but some processes require Mason jars. For home canners, the jars themselves are reusable, so once you buy them, they become an investment for years to come.

What is a glass mason jar?

A glass mason jar is a cylindrical jar, made out of glass that has a screw top, rubber ring and matching lid. When put together it creates an air-tight seal which is the ideal place for keeping foodstuffs.

Why do they call it a mason jar?

The Mason Jar was invented by John Landis Mason in 1858. He invented the jar out of necessity as most jars at the time were unreliable and unsafe for food. Masons glass jar had a screw top lid and was perfect for preserving and storing food.

What are mason jar sizes?

It depends on the size of the jar. You can find mason jars online in the following sizes:

  • 4 ounce
  • 8 ounce
  • 12 ounce
  • 24 ounce
  • half gallon
  • half pint
  • pint
  • quart
  • regular mouth
  • wide mouth

What to use a mason jar for?

Most people use mason jars to preserve food items, but they can also be used for all sorts of arts and crafts. Check out a blog post we did on various ways you can use a mason jarways you can use a mason jar:

Why use a mason jar?

There are plenty of reasons to use a mason jar. From keeping your food in a safe and sanitary container to cool arts and crafts.

Where to buy a mason jar?

From Container & Packaging, of course! If you don't see what you're looking for, give us a call at (800) 473-4144 and one of our friendly customer service representatives will help find it for you!