All food packaging materialsâ€“ whether glass, aluminum, paper or plastic â€“ may contain substances that can â€œmigrateâ€ in very miniscule amounts to foods or beverages. The FDA reviews the safety of packaging components that can reasonably be expected to migrate into a food, even in tiny amounts, using comprehensive evaluations that focus on a number of factors, including cumulative exposure to food contact substances, the type of packaging used and the safe levels of exposure to the material.