The nation's 175,000 letter carriers will pick up non-perishable food left by mailboxes on Saturday, May 11, to deliver it to local food banks, as part of Campbell Soup Company and the National Association of Letter Carriers (NALC) Stamp Out Hunger campaign.

The Stamp Out Hunger food drive benefits Feeding America, a domestic hunger-relief organization. In 2012, more than 70 million pounds of food were donated by 10,000 communities, helping to put millions of meals on the tables of Americans in need.

In honor of the initiative's 21st anniversary, Campbell's will contribute one million pounds of food and 21,000 cans to Feeding America, according to the company's news release.

To participate in the food drive, people are encouraged to leave a sturdy bag containing non-perishable foods, such as canned soup, canned vegetables, pasta, peanut butter, rice or cereal, next to their mailbox prior to the time of regular mail delivery on Saturday.