Food packaging's functions are as diverse as they are important. They are broken down as follows.

Containment: For items that are granulated, paper-based packages are the best with a sealing system to prevent moisture infiltration of the product. Other products are packaged using metal cans, plastic bags and bottles, and glass. Another factor in containment is packaging durability, meaning the packaged food has to survive transport from the packaging at the food processing facility to the supermarket to the home for the consumer.

Protection: The packaging must protect the food from biological agents in rats, insects, and microbes; from mechanical damage such as product abrasion, compressive forces, and vibration; and from chemical degradation such as oxidation, moisture transfer, and ultraviolet light.

Communication: Packaged food must be identified for consumer use mainly with label text and graphics. It can also be shown with the food package's shape such as the Coca-Cola bottle or the can of Spam. Other well known food package shapes include the potato chip bags and milk bottles. These packages also detail nutritional information, if they are kosher or halal-manufacturers and consumers. These products can be purchased all at once such as frozen pizza or as part of a larger package such as a twelve pack of beer. Another use may be to see if the package can go through a microwave process such as a TV dinner. Other items included pour spouts already on the bottles are other methods to ease dispensing of the product.

Environmental issues: This means that we must be done to reuse the packaging, reducing the size of the packaging, and then recycling of the products to be remanufactured.

Package safety: That the package be used for safety of the food from the package or vice versa. This includes any metal contamination issues from a can to the food product or any plastic contamination from a bottle to a food product as well. Also it can be: Bin Boxes, Paper & Wraps  and other packaging products.