It is sometimes convenient to categorize packages by layer or function: primary, secondary, etc. 1  Primary packaging is the material that first envelops the product and holds it. 2  Secondary packaging is outside the primary packaging, and may be used to prevent pilferage or to group primary packages together.
Does Corn Need To Be Refrigerated? Corn does not typically need to be refrigerated in order for it to be safe to eat. You will want to be aware of the fact that the longer you keep your corn in the refrigerator, the more flavor and vitamins you will lose, so it will not have quite as much nutritional value or taste to it.
Store uncooked sweet potatoes in a cool, dry place for up to a month. Bake whole sweet potatoes ahead of time and refrigerate them for up to 10 days. Microwave them when you want a quick side dish or a satisfying small meal. You can also refrigerate or freeze sweet potato puree, then reheat it later as an ingredient or as a finished side dish. Prepare a sweet potato casserole and store it in the refrigerator to await baking at your convenience. As with any cooked food, refrigerate cooked sweet potatoes within two hours of preparing them.