The existing Kilner® fermentation series is expanded with a larger 5-liter glass. With this generous glass, you can produce larger quantities of delicious, fermented foods that are enriched with additional vitamins, minerals, and probiotic cultures. The silicone lid with an airlock allows gas to escape while preventing air from entering the glass during the fermentation process. The clever design of the silicone disc and glass weight ensures that the contents are submerged beneath the brine, preventing any spoilage.