How does the author's blue jar metaphorically represent the end of her marriage as noted in the memoir, There I Am: The Journey From Hopelessness to Healing?

In the chapters describing the deterioration and end of her marriage to Jack, the author makes specific reference to a large, blue glass jar, one of several similar jars kept in the kitchen of their home. The jar carries with it several metaphoric values relating to the state of their marriage, its emptiness representing the emotional emptiness they both feel, and the fact that it is broken by the woman with whom Jack eventually has an affair representing how the marriage is broken.