Agreed, the invention of the Conex cup [1] by Illinois Tool Works, especially the C10 [2], marked the date when whiskey became drinkable.

[1] https://patents.google.com/patent/US2905350A/en

[2] https://archive.org/details/conex-containers-1968/page/n11/m...

Is a whisky that doesn't melt a plastic cup worth drinking?