I don't know what it is but every time I make a soup or chili, and I make a really good chili, after 2 or maybe 3 servings I'm done and we have half a pot left. I don't believe soup or chili freezes all that well from my experience. I made a really interesting thing called African Peanut Soup. PIcture if you will peanut butter soup with garbanzo beans with a little chicken and some greens. I brought it to a dinner party and it was big hit despite it not going at all with the Italian menu the host served. And it did freeze well but it was really rich and I grew tired of it quickly. But I may try it again and I'll make a half a batch.