TBH I’ve never seen one of these outside of a USA movie still showing a “college party” scene, not even in the increasingly Americanised UK supermarket at the top of my road (ASDA==British Walmart).
Then again in UK and Europe the legal age for drinking alcohol is 18 so there is much less need for young adults to hide what they are drinking, and no shame in drinking out of a bottle or can if there is not any other suitable glassware available… (it has been rare since late 1970s to see kegs of beer being served at British parties as the poor quality of it made the UK an international laughing stock).
It is now possible to get polypins and other bulk supplies of good real ale for your party, but implies the folk attending it are going to be mature enough to use proper drinking vessels :laugh_at:
The inventor of the red solo cup, Robert Leo Hulseman, has died at the age of 84 | The Independent