Q: What material is used to make the caps?
Q: If this is plastic why is it good for the environment?
Q: Are the caps dishwasher safe?
Q: Can I microwave the cap or use them for canning?
Q: My spout lid is tight, what can I do?
Q: How can I get my local store to carry the caps?
Q: How can I recycle the cap?
Q: Where are the caps made?
Q: Can I remove the gasket for cleaning?
Q: Does the cap have a patent?
Mason Jar Facts
The jars were an immediate success! They offered a more reliable method of preserving foods and were widely used across the country allowing homesteaders and urban populations to flourish. Like today, the jars were affordable and re-useable. For the next 100 years, with only some minor tweaks, mason jars were an integral part of food preservation. Although “canning” (the American term for home preserving) decreased in popularity in the mid-1900’s, we are seeing a 21st century resurgence due to economics and desire for better food choices.
You will often find old jars famously embossed with “Mason's Patent Nov 30th 1858" even after the expiration of his patent. Because competitors produced most mason jars after his patent expired in 1879, Mason did not become wealthy and he died broke in New York City in 1902.
“Mason” is still the common term for the jar but they are also referred to as Ball jars, fruit jars or canning jars. In the UK, "Kilner Jars" and Norway "Norgesglass". Today’s common brand names are Ball, Kerr and Bernardin (Canada), all now made by Jarden.
The jars have a standard continuous thread in two sizes: regular mouth (70mm) and wide-mouth (86mm). This is the common definition of mason jars, however, any screw-neck jar can be considered a “mason jar”. In fact, you can find jars that have “Mason” embossed on them that are neither the standard sizes nor have a screw thread. So when reCAP states that the caps fit most mason jars, it’s with these variations in mind.
Jars come in a variety of volumes for both mouth sizes. You can have a jar as small as 4 ounces or as large as a gallon.
Mason jars are primarily used for home canning but there are endless other uses for them. Some of the links below are good resources: