21 Shelf-Stable Wonders from the 60s and 70s That Lasted Longer Than You Might Expect

Thanks to their airtight sealing process and high sodium levels ( a natural preservative), these canned soups could comfortably see you through the better part of your childhood without spoiling. The iconic Campbell’s tomato soup, for instance, would taste just as good when your mom brought it home as it would the following winter when you suddenly get a hankering for dunking your grilled cheese.