A couple years ago I got a great deal at Amazon on soup base. Bought a box of both chicken and beef - six big jars to a box. I use it a lot but still have three left of each. The jars say that they expired last summer. I've been using it anyway and it tastes fine. I looked it up online and sources say soup base is good for 10 years. I'd hate to waste good stuff -- what do you think?