And a lot of those are related. Big country means that our cities can sprawl. Big (low-density) cities mean that our roads can be wide. Big roads mean that our cars can be big.

Big country also means that there are a lot of people, and sooner or later a good percentage of them want to live close together, so they build big (dense) cities, which means big buildings.

And the sprawl leads to the part about big containers of unhealthy food, too. If you live more than an hour away from the nearest grocery store, you're unlikely to get groceries more than every other week or so, which means you need to buy larger, more shelf-stable containers of food.

I believe (based on nothing but a whim) that us shopping culture is based on buying supplies (shopping for a week or more) while the European shopping culture evolved more from daily supplies from the market. Rural Europe would be the same i guess, but old cities was made for daily commerce

Americans don't dip their fries in mayo. Thats a Dutch/Belgian thing