Smuggling The Rocky Mountain Beer
Only after 1985 did Coors Beer become commercially available in the United States. It was formerly exclusively found in a few western states. President Gerald R. Ford was a huge fan of Rocky Mountain beer. So, when he went to the states where the beer was sold, he smuggled them back to DC on board.
Source: Imgur
He once flew Air Force One only to stock up on beer. We assure that his trip contained some business, but the beer was the main reason for his visit.