According to the search results, there is a condiment that never expires, and that is salt. Salt is a mineral that is taken from the earth, and it has been used for centuries as a tool for preserving other foods because it removes moisture. The salt in your cupboard may not last forever, though. Adding iodine to table salt reduces the shelf life, so if your container says iodized salt, expect it to only last about 5 years. Therefore, if you have non-iodized salt, it can last indefinitely if stored properly.