Ikea Korken Glass Storage Jar with wire snap lid 1.9 qt NWT The IKEA KORKEN jar with lid is a clear glass jar with an airtight seal that's ideal for preserving pickles, jams, beverages, or keeping cookies crunchy. The glass allows you to easily see what's inside, which can help increase the likelihood that food is eaten and not thrown away. The jar is made of impact-resistant glass that can sometimes be taken straight from the freezer to the oven without cracking.