I was cleaning up some of my stuff in storage, on the weekend, and made a great find: about 20 original Empire Strikes Back promo cups from McDonald’s. From 1980, and never used. There is a little bit of yellowing on the rims but they are otherwise mint. There used to be hundreds but, over the years, they have been treated as disposable and used for things like mixing paint; target practice; even drinking.
How sweet is that?