I recently read an article (I hope it wasn't here) about ingredients that never go bad. I can't find it now but remember salt was one of the few items on the list - and I think corn syrup. I ask because I have a jar of cream of tartar I probably got as a wedding gift some 23 years ago. I can't find any information about how long it lasts. And, I think dried legumes last forever too. What other items in your pantry have infinite expiration dates?