The jar is airtight and suitable for preserving food. But bear in mind that the rubber gasket needs to be clean and in good condition to function properly.
Good to know
If you want to sterilize the jar with hot water, preheat the jar first with warm tap water. This prevents the glass from cracking. Wash and dry this product before using it for the first time. The glass jar is dishwasher-safe. The gasket needs to be washed by hand.
The jar has an airtight seal, which makes it perfect for preserving your favourite homemade jams and jellies. The airtight seal helps food retain its flavour and aroma longer. The transparent jar makes it easy to find what you are looking for, regardless of where it is placed. http://www.ikea.com/th/en/images/products/korken-jar-with-lid__0131000_PE285441_S4.JPGKORKEN Jar with lid, clear glasshttp://www.ikea.com/th/en/catalog/products/00213544/002.135.44THB 69