A jar is a rigid, approximately cylindrical container with a wide mouth or opening. Jars are typically made of glass, ceramic, or plastic. They are used for foods, cosmetics, medications, and chemicals that are relatively thick or viscous: pourable liquids are more often packaged in a bottle. They are also used for items too large to be removed from a narrow neck bottle.
The glass jar is often an essential for any kitchen cupboard. They can be used to preserve or store items as diverse as jam, pickled gherkin, other pickles, marmalade, sundried tomatoes, olives, jalapeño peppers, chutneys, pickled eggs, honey, and many others. They are also frequently re-used in order to put home-made preserves in. Jars are sterilised by putting them in boiling water or an oven for a number of minutes. If they are not required for further storage of items, they can be recycled.
Glass jars are considered microwavable with care taken to prevent splashing of boiling contents
Jars are often recycled according to the SPI recycling code for the material. Some regions have a legally mandated deposit which is refunded after returning the container to the retailer. Some recyclers have concerns about possible residue in the jar from the viscous contents.
Preserved food in Mason jars
Jar made of PLA-blend bio-flex, a bioplastic
Six types of "earthenware jar" in Spain: 1) Roman jar of the 1st century (Murcia); (2) Arab jar of the 10th century (Medina Azahara, Córdoba); (3) earthenware jar of Peñas de San Pedro (Albacete); (4) earthenware jar of Tamames (Salamanca); (5) Madrid earthenware jar; (and 6) Castilian earthenware jar.
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|Wikisource has the text of the 1911 Encyclopædia Britannica article Jar.|
- Child-resistant packaging
- Jar (disambiguation)
- Tamper resistant
- Yam, K. L., "Encyclopedia of Packaging Technology", John Wiley & Sons, 2009, ISBN 978-0-470-08704-6
- Soroka, W, "Fundamentals of Packaging Technology", IoPP, 2002, ISBN 1-930268-25-4
- Ahvenainen; R.-L. Heiniö (1993). "Factors affecting the suitability of glass jars for heating in microwave ovens. Comparison with plastic jars and paper board tubs". Packaging Technology and Science 6 (1): 43–52. doi:10.1002/pts.2770060108. Retrieved 2 Oct 2013.