knockoutkärl
Knockoutkärl, also known as knockout jars, are a type of glass container used for preserving food by creating an anaerobic environment. This is achieved by sealing the jar with a lid that allows air to escape but prevents re-entry, creating a vacuum that inhibits the growth of aerobic bacteria and mold. The term "knockout" refers to the process of knocking out the air, which is done by inverting the jar and lid several times to displace the air.
Knockoutkärl are commonly used for canning fruits, vegetables, and meats. The process involves filling the jar
The use of knockoutkärl has been practiced for centuries, with evidence of their use dating back to