>The obvious solution is to reuse the same plastic cup for all customers each morning. Voila, now you save 309 plastic cups/day.

Mysophobes[0] are quite common in the US, so multiple people touching the same cup wouldn't fly here.

That's why many folks won't take mints from a dish at restaurant cashier stations if they're not individually wrapped. Many folks take an extra paper towel in public bathrooms to use on the door handle as they exit.

And on and on.

The US is, mostly, a center-right to far-right country. And as many studies have shown, there's a correlation between higher "disgust sensitivity" and right-leaning folks.

Isaac Asimov drew that distinction pretty starkly in comparing (robot stories and later Foundation follow ons) "Spacers" to "Settlers".

[0] https://my.clevelandclinic.org/health/diseases/22436-mysopho...