What about mayonnaise, mustards, tartar sauce, horseradish and some salad dressings?
They would spoil if opened.
Hmm, I don’t buy them. I’d still put in glass and keep in fridge. And I would avoid any that have preservatives or any other chemicals in them, including “natural flavor” which is a form of MSG. I make my own salad dressings, or used to. Hub doesn’t like them so I don’t make. Mustard I buy in glass jars, I don’t use a lot so a glass jar is okay for us.