One of my favorite UA flights was SFO-LHR on the upper deck of a 747. The plane took a two-hour mechanical delay and we didn't even care; we were just having a blast watching movies and hanging out and enjoying the upper deck. We were young and in love.

At some point during the flight my wife told the FAs that she really liked the cute little form factor of alcohol minis ("what a fun way to package liquor!" or something).

At the end of the flight a FA discreetly brought my wife a huge UA garbage bag stuffed with unopened minis. "You have to take these."