Too Old To Cut, I Mean, Store The Mustard

I read an interesting article about many foods that didn't need to be stored in the refrigerator. Mustard and ketchup were two items listed.  I had no idea.  Now that I thought about it, you always see mustard and ketchup bottles out on the tables in restaurants.  I can't imagine that employees would gather all of them up when the restaurant closes and put them in the refrigerator, and then have to get them out the next morning and put them back out on the tables.

I did a little research, and mustard is made to be immune to bacteria, so that means it should (key word) never spoil.