0 a brand name for a type of glass container with a wide opening at the top and a fitted lid that is usually sealed (= completely closed) with a rubber ring, used for storing food: --
Pesto will store refrigerated in a Kilner jar for about three weeks.
Kilner jars are great and have that lovely homemade look in the larder or fridge.
If you want to make a big batch of the spiced plums you can keep them in the fridge in sterilised Kilner jars.
Pack the washed leaves into sterilised Kilner jars.
On the side was a small Kilner jar of peppered pineapple relish.