If you got a grocery bag in the mail this week, today’s the day to use it. If you didn’t, grab your own and fill it with nonperishables.

Today is the Stamp Out Hunger food drive, a convenient way for tri-county residents to donate food to the needy.

It is the 20th year of the tradition, which has provided more than 1 billion pounds of food nationally since 1992.

The National Association of Letter Carriers and the Lowcountry Food Bank will work together locally.

Residents can leave nonperishable food donations by their mailboxes for pickup by their carrier, or take those items to a local post office. Donate items that don’t require refrigeration, but do not include goods that are expired or in glass containers.

The Lowcountry Food Bank serves as a food provider and anti-hunger advocate for agencies in Berkeley, Charleston and Dorchester counties that provide hunger-relief services, such as food pantries, soup kitchens and children’s programs.

Major national sponsors of the drive are the U.S. Postal Service and Campbell Soup, which has earmarked a 1-million-pound canned food donation.

In South Carolina, Publix Supermarkets provided 2.5 million food bags to residents for their donations.

Used for the first time statewide last year, food bags drove up donations from 273,305 pounds to 382,627 pounds of food, according to the Postal Service.

In the Lowcountry Food Bank’s service area, a record 140,000 pounds of food was collected last year.