I can tell you that the oldest items commonly found in pantries or freezers of some households might be frozen food or canned goods that were purchased and forgotten about for an extended period.
Frozen foods like meats or vegetables could potentially be kept for several months or even a year if they are properly stored in a freezer. Canned goods, on the other hand, generally have a longer shelf life, often ranging from one to five years or even more, depending on the product.
Of course, it's essential to check expiration dates and follow storage guidelines to ensure the safety and quality of food items. If you suspect there might be extremely old items in your pantry or freezer, it's best to dispose of them properly and make a habit of rotating and using food items regularly to avoid waste.