Jar
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A jar is a rigid, cylindrical or slightly conical container, typically made of glass, ceramic, or plastic, with a wide mouth or opening that can be closed with a lid, screw cap, lug cap, cork stopper, roll-on cap, crimp-on cap, press-on cap, plastic shrink, heat sealed lidding film, an inner seal, a tamper-evident band, or other suitable means. The English word "jar" originates from the Arabic word jarra, which means an earthen pot or vessel.<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
BackgroundEdit
Jars can be used to hold solids too large to be removed from, or liquids too viscous to be poured through a bottle's neck; these may be foods, cosmetics, medications, or chemicals.<ref>Yam, K. L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, Template:ISBN</ref> Glass jars—among which the most popular is the mason jar—can be used for storing and preserving items as diverse as jam, pickled gherkin, other pickles, marmalade, sun-dried tomatoes, olives, jalapeño peppers, chutneys, pickled eggs, honey, and many others.Template:Citation needed
TypesEdit
- Bell jar – typically used in scientific laboratories to produce a vacuum; also used in Victorian times for display purposes
- Cookie jar – typically ceramic or glass, common in the United States, Canada, and United Kingdom
- Killing jar – used to kill captured insects
- Leyden jar – a historical electrical capacitor
- Specimen jar – an instrument used in anatomy to preserve specimens
- Apothecary jar – historically for storage of medicines; made of ceramics or more typically in modern centuries, clear glass. Typically cylindrical or with rotationally symmetric decorative curves, sometimes with a glass disc foot separated from the main body. Modern glass versions are also used for artistic display of the contents.
- Modern glass food storage jars come in a variety of shapes, all of which have a circular opening on top for screwing on a lid
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- Economy round or wide mouth jars – tall but rotund cylinder slightly rounded at the top and bottom, relatively wide with a wide mouth, commonly used for sauces like a mayonnaise
- Paragon jars – tall and narrow cylinder, commonly used for pickled foods such as olives
- French square or Victorian jars – roughly a small cube
- Spice jars – small cylinder or rectangular cuboid
- Hexagon or hex jars – regular hexagonal prism
- Mason jars – moderately tall cylinder typically used in home canning, sealed with a metal lid
- Kilner jar – similar to a Mason jar but sealed with rubber
- Straight-sided jars – cylinders with no neck. Squat straight-sided jars are suitable for creams which can be scooped out.
- Ancient ceramic types include
- Amphora – large, but typically holding under 50 L
- Pithos – very large, typically the size of a person and holding hundreds of liters, Pandora's Box is often referred to as Pithos
- canopic jar
UtilityEdit
Jars are sterilised by putting them in a pressure cooker with boiling water or an oven for a number of minutes. Glass jars are considered microwavable.<ref>Template:Cite journal</ref>
Some regionsTemplate:Where have a legally mandated deposit refundable upon return of the jar to its retailer, after which the jar is recycled according to the SPI recycling code for the material.<ref>Template:Cite book</ref>
GalleryEdit
- PreservedFood1.jpg
Preserved food in Mason jars
- Jam jar.jpg
Reusable jam jar with flip-top or bail closure
- Jar made of PLA-Blend Bio-Flex.jpg
Jar made of PLA-blend bio-flex, a bioplastic
- CandyJaracp.png
Candy jar
- HK Central Kai Bo Foods Buddy's 花生醬 Peanut creamy Butter Skippy April-2012.JPG
Peanut butter
- Orzas in Spain.jpg
Six types of "earthenware jar" in Spain
- Brown-glazed Jar with Design of Three Fish. Yuan Dynasty. Excavated from Hancheng City.jpg
Brown-glazed jar with design of three fish. Yuan Dynasty.
- Jar with pump dispenser.jpg
PP jar of skin cream with pump dispenser
- Ceramic Pickle Jars.jpg
Traditional Indian Ceramic Pickle Jars
See alsoEdit
- Canning
- Home canning
- Child-resistant packaging
- Hu (vessel)
- Jug
- Jar opener
- Tamper-evident
- Tamper resistant
- The asterism Water Jar in the constellation Aquarius