What is Jar?
{{other uses}} [[Image:Jam jar.jpg|thumb|A jar filled with [[jam]].|alt=small squashed looking Jar filled with dark purplish-red jam with a metal lock on the lid]] A '''jar''' is a type of [[container]], mostly used to store food. Jars are usually [[cylinder|cylindrical]], and are usually made of glass or clay. Glass jars are able to be heated in [[microwave oven]]s.<ref>{{cite journal | title =Factors affecting the suitability of glass jars for heating in microwave ovens. Comparison with plastic jars and paper board tubs | journal =Packaging Technology and Science | volume =6 | issue =1 | pages =43–52 | date =1993 | doi = 10.1002/pts.2770060108 | url =http://onlinelibrary.wiley.com/doi/10.1002/pts.2770060108/abstract | accessdate = 2 October 2013| last1 = Ahvenainen | first1 = R. | last2 = Heiniö | first2 = R.-L. }}</ref> ==Types of jars== * [[:en:Mason_jar|Mason jar]], a jar used to [[Food preservation|preserve]] serval foods (such as fruit, jam, vegetables, ...) * [[Kilner jar]], another type of jar for storing foods * [[Mayonnaise jar]], a mason jar especially made for mayonnaise * [[Canopic jar]], used in ancient Egyptian burial * [[Leyden jar]], a simple capacitor * [[:en:Killing_jar|Killing jar]] ==References== {{reflist}} [[Category:Containers]] {{stub}}