Kilner jars are a staple of the nation’s larders. We thought we’d lift the lid on their history
The Kilner company was originally established as a bottle manufacturer, with the Kilner Glassworks being founded by John Kilner in 1842 in Thornhill Lees, West Yorkshire, making bottles and apothecary items. The company passed to Kilner’s four sons on his death and continued to be hugely successful, even accepting an award at The Great Exhibition in 1862 for innovation in glassmaking.
But in 1871 the company was taken to court over the coal smoke that billowed from its chimneys, polluting the neighbouring land. The judge ruled that ‘no man has the right to interfere with the supply of clean air.’ The factory was forced to close temporarily in order to convert to gas furnaces but managed to get back on its feet, even investing in new mechanisation as the end of the century loomed.
It wasn’t until 1900 that Kilner produced its first jar with its famous patented vacuum seal, still recognisable to bottler and preservers today. But in the first decades of the 20th century, competition in the industry saw Kilner suffer and eventually in 1937 the company went bankrupt and the patents and were sold to United Glass Bottle Manufacturers.
Despite the business leaving the hands of the Kilner family, the jar itself went from strength to strength. In the 1960s the first Kilner jars with metal discs and screw bands were introduced and in the 1970s replaced with a less attractive but very practical plastic screw band.
In 2000 the Rayware Group bought the patent, design and trademark for the original Kilner jar and today the range includes everything from infusion jars to make-and-take Kilners for picnics, and specially designed tops for every job from butter-churning to spiralizing.
So next time you’re bottling tomatoes or packing up your salad lunch, consider that you’re screwing the lid onto a Victorian miracle and 120 years of glassmaking history.
In our October issue, we’ve curated a few pages of photographs of lovely larders, including the one above by @designermumetc.
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