USPS Home > About USPS & News > Forms & Publications > Postal Periodicals and Publications > Publications > Publication 2 - Packaging for Mailing > 2 Containers
Several types of containers are acceptable for mailing items if the containers
and items are prepared within the standards of this publication. The principal
types of mailing containers include the following:
• Bags, bales, bundles,
films, and wraps.
• Cans and drums.